It is possible to link filtering policies to groups of USO users. Multiple USO User Groups can be linked to a single policy group if required. To use this functionality please first complete the setup process which is fully outlined here

Use this button to select USO User Groups as the target for the policy group being edited.

To target a USO group simply select the desired group from the dropdown list and click Save target. New USO groups can be created on the User groups page.