dhcp and mac address

[Vivek Kumar]

Hi all,

There is a PC which is setup to get its IP through DHCP. But the
firewall script allows only few users ( I have talker's list) to get out
to internet so this user is unble to browse internet as talker's list
doesn't have his IP mentioned.
Is it possible to freeze the mac address to get a particular ip at boot
time in other words whenever that PC is booted and requested for IP that
nic card gets a particular IP.
Windows people don't want to setup his PC for static IP as he can use
the same dhcp configuration at home for his DSL.
the DHCP is running on AS (advance server ) box.

Thanks a lot !!

VK