Netware 5.1
DNS/DHCP Console 6.5-SP2

I am running into to an issue where some users have brought in unauthorized
laptops from home. So now I want to defeat the ease of DHCP without
shutting it down. Ideally I would like to have DHCP for authorized MAC
addresses only. Any new NIC would have to be added to the list before it
could obtain an address.

Is this possible? Or is it so opposite of what DHCP does that I would be
better off using Static? I am just tired of tracking down laptops that just
get plugged in and the user has no clue that they shouldn't be doing this.