Did Ron Silver act in "The Thirteenth Floor"? I think he did a role as a jury in the scene of the dance contest. I´m talking about the same actor in Timecop.
IMDB says no.
Now, admittedly Ron Silver could have taken time out from his busy filming schedule at the end of 1998 to do a small uncredited cameo role in a low-budget sci-fi film as a favour to a Director to whom he has no obvious connections but it seems unlikely. Also, none of the judges look like him.