HELP!brother and i cannot play battlefield 4 on 2 computers on the same network at the same time, separate accounts

i had this on bf3 in co op...waited and waited on help desk and they said they would look into it..i never got to finish it...

It randomly works i try restarting the computers/ routers/modems and sometimes it will work, but most of the time we cannot play together ... it's almost more trouble than its worth.. this seems like a simple ip fix or something i can't figure it out

Disable UPnP at the router & on the computer.

edit: forgot to beg & grovel for XP like a hero.

With the Black Friday deals on Origin / Gamestop / Amazon, a lot of folks are buying the game up.  I got two copies for my wife and I and it looks like we are experiencing the same problem.  If I join a server, I can play just fine, she can't join on me.  If she joins a server, I can't join on her.  I definitely think it's similar IP Address related.  I was trying to find Error Logs on my computer that would let me know WHY it's not working but can't find anything for the Battlelog errors.  

I tried d4isycutter's recommendation to disable UPnP on my and her computers and also on my Router and that did not help.

There is a patch dropping tomorrow so my fingers are crossed:

http://battlelog.battlefield.com/bf4/forum/threadview/2955064769163140123/

At least if the problem persists, we can see if there's better troubleshooting.

Hankspropane - What router/switches are you using on your network, if you don't mind me asking?