Only baptized, dedicated JWs are marked for survival according to the WTS. Ezekiel chapter 9 has long been applied to the WTS doing the marking.
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w88 9/15 p. 14 Listen—Jehovah’s Watchman Speaks! ***/Marked for Survival17
Next, we note seven men—one a linen-clad secretary and six others with smashing weapons. (Read Ezekiel 9:1-7.) The "six men" represented Jehovah’s heavenly executional forces, though he could use earthly agents. Those whose foreheads the ‘man in linen’ marked would experience God’s compassion because they were not in sympathy with the detestable things done at the temple. Execution by the "six men" began there with the 70 idolatrous elders, the women weeping for Tammuz, and the 25 sun worshipers. These and others disloyal to God were killed by the Babylonians in 607 B.C.E.
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The antitypical ‘man in linen’ is the class of anointed Christians. They go from house to house to put a symbolic mark on those who become part of the "great crowd" of Christ’s "other sheep." The "mark" is the evidence that such sheep are dedicated, baptized individuals with a Christlike personality. They ‘sigh and groan over detestable things’ done in Christendom, and they have come out of Babylon the Great, the world empire of false religion. (Revelation 18:4, 5) Their "mark" will make it plain to God’s executional forces that they should be spared during the "great tribulation." They can retain that "mark" by sharing with the anointed ones in marking yet others. So, if you have been ‘marked,’ share zealously in the ‘marking’ work.—Ezekiel 9:8-11.
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w72 10/15 p. 638 Are You a Supporter of Divine Rulership? ***If you are one of the unnumbered "great crowd" you will cooperate side by side with the anointed ones. You will be a full advocate and supporter of Divine Rulership. You will see that you maintain the "mark," which is the evidence that you are a dedicated, baptized disciple of Jesus Christ and that you have a Christlike personality that differentiates you from all hypocritical "Christians." You will aid others to get and retain the "mark." This will make you an integrity-keeping slave of the Almighty God, with sure prospects of entering into Jehovah’s further service in His new system of things under the Lamb Jesus Christ.
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kl chap. 18 p. 180 Make It Your Aim to Serve God Forever ***A dedicated, baptized person faithfully endeavoring to follow Jesus is special to God. Jehovah examines all the billions of human hearts and knows how rare such individuals are. He considers them to be treasures, "desirable things." (Haggai 2:7) Bible prophecies show that God views such ones as marked to survive the execution of his judgment soon to come upon this wicked system of things. (Ezekiel 9:1-6; Malachi 3:16, 18) Are you "rightly disposed for everlasting life"? (Acts 13:48) Is it your earnest desire to be marked as one serving God? Dedication and baptism are part of that mark, and they are essential for survival.
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su chap. 12 pp. 96-97 Identified for Destruction or Survival? *** 14
Many people are disillusioned with the churches and no longer attend. They may also be greatly disturbed about the violence and dishonesty in the world. But that does not necessarily mean that they are marked for survival. They must be marked by the ‘man with the secretary’s inkhorn.’ The facts show that "the faithful and discreet slave" class is doing that marking work today.—Matthew 24:45-47. 15
All who want to be marked as having God’s approval must accept the instruction that Jehovah is providing through that "slave" class and become true worshipers of Jehovah. They must not be persons who honor Jehovah with their mouths but who really love the world’s ways. (Isaiah 29:13, 14; 1 John 2:15) They must love Jehovah and his standards and feel grieved at heart, "sighing and groaning," over teachings and practices that dishonor him. No one will put a literal ink mark on their forehead.
But when they have the symbolic mark it will be obvious to all that, as dedicated, baptized Christians, they have put on the "new personality" described at Ephesians 4:24. They have a living faith. Publicly and privately they endeavor to do what will honor Jehovah. Not only persons who have come out of Christendom but all, regardless of background,
who hope to survive into the "new earth" as associates of the anointed class must have this mark.