hope this makes sense.

I have a few Window XP machines. I have at least two accounts on each
machine. One users logs into the Novell network via the Novell client,
durning the day. after they leave i have a second person that comes in and
logs on to the local windows account. The problem is that they can see the
"N" on the task bar and lanch the Novell client and log on if they know
the other users info. How can i stop the Novell client from being launched
or accesses from the local windows account? If possible.