Set this attribute under these conditions:
The specified user is assigned more than one AdminRole
You want to ensure that when the administrator is creating or editing a user, the member organization of the user being created or edited determines which object names of the requested type are available for assignment.
For example, under these circumstances:
the administrator were assigned both the Engineering AdminRole and Marketing AdminRole
the administrator is editing a user who is a member of the Engineering organization
the resources available for assigning to that user should be limited to the resources available to the organization(s) controlled by the Engineering AdminRole.