a non-jw lawyer legally gets access to the name of Darkspliver's identity, would he be legally obligated to tell the WTS?
In this case only the lawyers for WTS can know Darkspilvers identity. If they would reveal his identity to Watchtower they'd be violating a court order, which could/will have severe consequences for them.
So not even Polidoro can disclose Darkspilvers identity to his fellow JW hotshots. The big question is....will he obey the judge or not.