As far as we can discern, it is not possible to assign multiple IP addresses to a single interface under a standard Windows 95 system. On Windows NT it can be done via Control Panel → Networks → Protocols → TCP/IP/Properties... → IP Address → Advanced. Later versions of Windows, notably Windows 2000 and XP, support multiple IP addresses through the TCP/IP properties dialog of the Local Area Network in the Network and Dial-up Settings area of the Start menu.