In the current implementation if a group has many members only a subset (default 250) will be returned in the UI and CLI. We need to have a generic way to specify a filter in the same request so that the return list can be narrowed to a specific subset of entries.

It should be equivalent to "return all entries by this association that satisfy a search criteria".

This functionality is not available so there is no way to deal with the long groups or other similar relations.