Simply not true. I was able to do it successfully for a couple months. My brother and I would play in a party together all the time. I then stopped playing the game for a couple weeks and in the meantime I also got a new router. I'm not sure if the router caused the issue or if there was an update during the time I wasn't playing that caused the issue.
It's the answer i got from EA after they contacted respawn entertainment. If you were able to play then for some reason their servers had not identified that your computers were both on the same network, once that happens you are barred from playing in party or on the same team, you can even play on opposite teams in the same game. It's a stupid setup, and it's the EA game reps told me on the online chat and on the phone, and I got a refund for both mine and my wife's copy of the game because there is no way we can play in a party on the same network connection.
