Did they get punished, were they accepted back into the Jewish community, etc?
In the Soviet Union Jewish collaborators were punished severely, often more than other groups. First it should be noted that the Soviet court system was unprepared to handle hundreds of thousands of cases involving war crimes and collaboration, leading for a scramble to professionalize it and reduce arbitrary sentencing. This is part of a wider Soviet postwar trend towards rationalization and professionalization in contrast to the prewar hostility towards formality and bureaucracy. But despite this complaints about severe and unfair sentences were common, with many successfully petitioning for release later. Often political unreliability was enough for a conviction; for instance, 11 men were convicted of war crimes solely on the basis of being members of an SS police battalion without any investigation into what their individual crimes were.
In this context, Jewish collaborators (Usually members of local councils) were unlikely to receive lenient sentences. Regardless of whether they also provided aid to other Jews or weren't directly involved in war crimes, collaboration was severely punished. Death sentences or 20 years in a labor camp were common.
Local Collaborators on Trial: Soviet War Crimes Trials under Stalin (1943-1953) by Tanja Penter
Cold Peace by Oleg Khlevniuk
What Jews are you talking about? The Kapos in the ghettos?
A recent New York Review of Books article that may be of interest: