How to create Dota 2 Lan Lobbies
Step 1:
Login Steam and start Dota 2
Step 2:
Click the PLAY button found on the top portion of the DOTA 2 user interface.
Step 3:
On the CREATE LOBBY tab, select CREATE LOCAL LOBBY.
Step 4:
Click CREATE then wait for your friends to join the LAN Dota 2 room.
Step 5:
Start GAME when ready.