How dare 2K Games turn its back on the PC multiplayer community that made BioShock ... oh ... uh ... that's right. Well, they confirmed that BioShock 2 won't support LAN gaming or dedicated servers anyway.
In a Q&A on multiplayer posted at the Cult of Rapture, 2K explained their absence as a matter of ordering priorities within a limited time for development:
Bringing Multiplayer to BioShock was a daunting task between the tech (there was no multiplayer support in the codebase from the first game) and the expectations of the community. Either you try to do everything and so nothing feels finished or you focus your efforts to do a smaller number of things really well like an accessible online experience.
The rest of the Q&A offers more details on how multiplayer will work on all three platforms for this game, which releases on February 9.
BioShock 2 Multiplayer and Matchmaking Q&A [Cult of Rapture]