Network Logins

[John W. Wooten]

Is there a way to set up workstations so that if a user types
 woo at woonext.dsrd.ornl.gov at login, the login procedure would open a telnet  
session to the machine described without every giving access to the physical  
machine he's standing in front of?  I'm looking for a way to allow people to
walk up to a workstation in someone else's office and (with their permission)  
allow them to access their own workstation without having to have an account  
opened or without letting them use a terminal window in another users open  
area.  Has this been done?  Is it doable?  How?