To restrict specific IP addresses from printing, follow these steps.

1. Go to the webGUI, and log in as the administrator.
   Open an internet browser window and type the IP address of the printer in the address bar.
   
   
2. Click on "Device Manager", and then "Information".
   
   
3. Under the "Security" section, select "Edit".
   
   
4. Select "Restrict TCP/IP" for the option you want (IPV4, IPV6, MAC), and then choose "Reject".
   
   
5. Enter the IP and/or MAC address, and then click "OK" at the top of the page.