During the normal work Groupshare registers the creation, modification and last use User ID for each Translation Unit.
The problem is any translator can actually read other translators' userids while they translate.
User ids often reveal names of other translators or names of other agencies. This is against privacy laws and good marketing practices.
IDEA: Add a "can read Tm User IDs" in group privileges and then mask those ids when a user is translating and doesn't has that privileges.