I gotta say your first post made it sound like you couldn't have a dog present at all... the fact that you have to carry him in the lobby is frankly understandable to me, even as a pet owner, some people just don't have sense when it comes to keeping their pets (or kids for that matter) under wraps around the general public. Especially seeing as how a noticable percentage of folks are scared 'round dogs here, so holding 'em in the lift seems the courteous thing to do.
If he's a big dog, start lifting weights
As far as the barking, again understand the rule. Would hate for my neighbors to have to put up with barking just cuz it doesn't bother me (though it does) I've been in my place since March and my dog has certainly done plenty of barking, prob daily, and it's possible it can be heard outside the apt, yet no complaints. Guess you can only hope for the same...