WindowsEnabler/400 can use the user id to identify the workstation. If you want to use the user id to determine the workstation, it is required that the user id with which the user logs on to the AS/400 is the same as the user id with which the user logs on to Windows.
The WindowsEnabler/400 program uses the user id with which the user logged on to the system to determine the workstation from which the request is issued.