This is for those who think that Modern Warfare 3 will be a console port like it’s predecessor (MW2). Robert Bowling, IW’s Creative Strategist confirmed it via twitter that PC version of Modern Warfare 3 will feature LAN support.
Yes, #MW3 has LAN along with detailed class restriction control + default class creation option.
Then he said:
Ability to restrict any weapon, equipment, perk, deathstreak, secondary, attachment, ANYTHING from being used when setting up game.
So LAN just like the online play will have all the features to enjoy. LAN parties guys, LAN parties.