Multiplayer can work, but requires some setup first.
The problem is with the current DirectPlay implementation. Read here how to set it up: http://wiki.winehq.org/DirectPlayGames
To get multiplayer working for games that use a DirectPlay version prior to 8, place the following DLLs: dplayx.dll, dpnet.dll, dpnhpast.dll and dpwsockx.dll in this archive in WINE's windows/system32 directory, then add DLL overrides (native,builtin) with WINECFG.
In case of any problems be sure to see the instructions on http://wiki.winehq.org/Infinity_Engine_Games
The following comments are owned by whoever posted them. WineHQ is not responsible for what they say.
This isn't a version of the game...
by Dan Kegel on Wednesday March 17th 2010, 22:09
Unauthorized addons probably should be listed as separate products
somehow. This addon is rated poorly, and this reflects poorly
on the game in the appdb, which seems unfair.