The Pentagon is directly working with SpaceX on this. Awhile ago they said they had a handle on it but that it was going to be an ongoing problem as Russian evades their measures.

This was in May, and they've obviously figured another way around.

“At this time we have successfully countered Russian use, but I am certain Russia will continue to try and find ways to exploit Starlink and other commercial communications systems,” Plumb said. "It will continue to be a problem, I think we’ve wrapped our heads around it and found good solutions with both Starlink and Ukraine.”