Here's the instructions and URL on how to create an MAC based filter:
Follow these steps to create a MAC address filter:
Step 1 Follow the link path to the Address Filters page.
Step 2 Type a destination MAC address in the New MAC Address Filter: Dest
MAC Address field. You can type the address with colons separating the character pairs
(00:40:96:12:34:56, for example) or without any intervening characters (004096123456, for example).
Note If you plan to disallow traffic to all MAC addresses except
those you specify as allowed, put your own MAC address in the list of allowed MAC
addresses. If you plan to disallow multicast traffic, add the broadcast MAC address
(ffffffffffff) to the list of allowed addresses.
Step 3 Click Allowed to pass traffic to the MAC address or click Disallowed
to discard traffic to the MAC address.
Step 4 Click Add. The MAC address appears in the Existing MAC Address
Filters list. To remove the MAC address from the list, select it and click Remove.
Step 5 Click OK. You return automatically to the Setup page.
Step 6 Click Advanced in the AP Radio row of the Network Ports section at
the bottom of the Setup page for the radio you want to configure. The AP Radio Advanced page appears.