mac address filtering

Hello all,

I have an Apache server running on linux machine( Suse) at my
workplace. Its only for internal use, and the company firewall does
not allow any access from outside world.
- What would be the easiest way to filter http requests based on mac
addresses? I do not wish to filter them based on IP address, since IP
address keep on changing for the employees.
- I could probably use 'Iptables' for this, but that would block all
requests to the linux machine( e.g. ssh). That's why I would like to
do it in Apache, so that unauthorized employees may not read the web
pages, but they may ssh if they have user permissions on this machine.
iptables -A INPUT -m mac --mac-source <mac add to be filtered> -j
DROP

thanks in advance,

Cheers,
Mukul.