Here are some relatively recent (within the past decade) WT excerpts related to this topic.
From Come Be My Follower:
Jesus' illustrations, then, revealed truth to those whose hearts hungered for it; at the same time, his illustrations concealed truth from those with proud hearts. . . . As followers of Christ, we want to imitate his way of teaching, including his use of illustrations. (Come Be My Follower pp 119-120)
From WT 2/1/2007 article Why Be Truthful?
. . . . Moreover, we need to consider whether the person asking for information is entitled to a comprehensive answer. . . . What example did Jesus Christ set in this regard? On one occasion, Jesus was conversing with some unbelievers who showed interest in his travel plans. "Pass on over from here and go into Judea," they advised him. What was Jesus' reply? "You go up to the festival [in Jerusalem]; I am not yet going up to this festival, because my due time has not yet fully come." Shortly thereafter, Jesus did travel to Jerusalem for the festival. Why did he answer that way? They were not entitled to know the exact details of his whereabouts. So while Jesus did not utter an untruth, he gave them an incomplete answer in order to limit the possible harm they could do to him or to his followers. . . . (WT 2/1/2007 p. 6)
From WT 11/15/2004 article The Tent of the Upright Ones Will Flourish
The faithful witness does not commit perjury when testifying. His testimony is not tainted with lies. However, this does not mean that he is under obligation to give full information to those who may want to bring harm to Jehovah's people in some way. The patriarchs Abraham and Isaac withheld facts from some who did not worship Jehovah. (Genesis 12:10-19; 20:1-18; 26:1-10) Rahab of Jericho misdirected the king's men. (Joshua 2:1-7) Jesus Christ himself refrained from divulging total information when doing so would have caused needless harm. (John 7:1-10) He said: "Do not give what is holy to dogs, neither throw your pearls before swine." Why not? So that "they may never . . . turn and rip you open." -- Matthew 7:6. (WT 11/15/2004 p.28)