DBA_RSRC_CONSUMER_GROUP_PRIVS lists all resource consumer groups and the users and roles assigned to them. The grant referred to in this view and the related view is the grant of the SWITCH_CONSUMER_GROUP object privilege, which is granted using the DBMS_RESOURCE_MANAGER_PRIVS package. (This privilege is not granted through the GRANT SQL statement.)
Related View
USER_RSRC_CONSUMER_GROUP_PRIVS lists all resource consumer groups to which the current user is assigned. This view does not display the GRANTEE column.