Remove domain from list at login screen without removing computer from domain

Hey all,

I'm trying to make it so that some of the systems on our
network are unable to log into the domain without removing
the computer account from the domain because I still want
to use Offer Remote Assistance and be able to change
settings and whatnot remotely.

Does anyone know of a way to remove (or hide) the domain
as one of the options to log into on the login dialogue
box?

Thanks in advance,
Brendan