Right now the only way to see all cases contributed by group members is to assign group as collaborator to every singe case or to assign a study (as in C4R case). For large groups like UDN and C4R this is not a sustainable solution.
Once there is a super group involvement (e.g. UDNI) all cases need to have group as collaborator + super group as collaborator. The process is too cumbersome. Our users should not be bothered with it.