UserLock prevents simultaneous connections to Windows NT networks.
Editor: UserLock limits the number of simultaneous connections of the same user on an entire Windows NT/2000/XP/2003 network, restricts the computers where users or groups can logon and provides administrators with an accurate real time picture of connection activities across the network.


Here are some key features of UserLock:

-Limits simultaneous logons for specified users or groups on the network
-Ability to set workstation restrictions by computer name or by IP ranges
-Sends Notifications (E-Mail or popup) on successful and/or unsuccessful logging activity
-Inserts all logon/Logoff events and all Lock/unlock events in an ODBC database
-Workstation sessions and terminal sessions are supported
-Displays and prints user session History reports as well as session statistics
-Ability to lock or logoff user sessions from a central console
-Ability to protect: all trusted domains in the network, a single domain, an organizational unit, or a standalone terminal server in a workgroup
-Ability to install a UserLock backup server for enhanced reliability
-Ability to easily deploy agents on all workstations thanks to an integrated deployer.
you can free download UserLock 4.01 now.