You can add Circle members into different Groups in a Supported Users Circle, (if there are no Groups you will have to create some first, click here to see how to create Groups ) 

  1. Click the ‘+Groups’ link
  2. In the pop up select the Group/s you want to add the person to
  3. Click ‘Ok’, The tick will appear green now Group access has been given


NOTE: Circle members will only be able to access each other’s profiles if they share the same Group