Canon LBP7660Cdn Manual page 694

(1) Enter the MAC address of a device of which you want to permit to access.
Enter the MAC address without the hyphens (-), for example, AABBCCDDEEFF.
(2) Click [Add].
You can set up to 50 addresses.
NOTE
When deleting a set MAC address
(1) Select a MAC address you want to delete.
(2) Click [Delete].