Yes, you can apply a Black/White list by following the steps below:     Create a MAC list in Clients→ Client Access.   Connect to the GWN AP’s Web GUI and go to Network Group   Edit or create a new Network Group, and go to Wi-Fi   The Use MAC Filtering option is set to Disabled by default, users can choose   Whitelist or Blacklist, then check the MAC list configured in step 1 to apply.