Windows: A remote session is possible on Windows with the use of Microsoft's Windows Terminal Server (WTS) technology. In a single remote WTS client session, only one license is checked out no matter how many sessions you run within the WTC client environment. An additional license will be checked out with each remote WTS client session.
UNIX: If you log into a remote workstation using 'rlogin' or 'telnet', you use one license per ARC session. Once your display is set, each additional ARC process running in a remote command prompt window uses another license. Any command prompt window executing on a remote host, regardless of where it is being displayed, will use an additional license.
If your display is set to a remote machine and you initiate a remote session, you will check out an additional license, even if your ArcInfo session is local, running on your local CPU.