When building a Dynamic Query for group membership, we have access to pretty much every object (i.e. Node, volume, application, container, etc... ) but not to groups.
Basically, we can only add nodes to groups.
I would like to have a group which contains other groups identified in a Custom Property. In our case, each of our groups have a "Zone" custom properties, and represent a site. Having access to the Group object would make our life easier and not having to manually maintain the Zone groups with all that entails.