If you want to prevent anyone else from logging into the workstation, you can do it in one of two ways. First, select all the users except the user you configured above, and bring up the properties screen. (This will show the properties for all the selected users.)
Select the Account tab and check the box next to Computer Restrictions. Next, click the box titled "Log On To…" and in the "Logon Workstations" screen select all the computers except the computer that you don't want anyone else to log into. You will need to make sure if you create additional users or workstations that you update these settings accordingly.
Alternatively, if you use something like Windows Scripting Host for your login script, you can write a script that checks to see the logon workstation. If it detects that the workstation is the one you don't want anyone to log into, it immediately logs them right back out. I recommend searching this site for Win32 scripting examples of scripts that can do this kind of functionality.
This was first published in January 2007