A set of simple User Access Permissions can be applied at both the database level and the model group level.
Only a database owner can give users control over a model group.
A model group can have any number of owners. Full owners of a model group have full rights over the group, and over other model groups contained within the group. Additional owners may also be added to "child" groups.
To assign owners to a model group:
This displays the Edit Owners dialog. Press F1 for help.
This displays the Manage User Permissions dialog. Press F1 for help.