
No, this isn't dominance, it's just plain dalmatian wilfulness! As you say, once they are 'in flight' so to speak, you usually have to forget about calling them because they'll simply ignore you, and the more you call, the more they learn that they can ignore your call!
I would suggest that you keep calling her to you, hold her collar, give her a treat and lots and lots of praise, then let her go again. Do this every few minutes when she's close to you, but it is vital that she doesn't get the treat until you are holding her collar - that is an essential part of the recall. Sometimes clip on her lead for a minute then let her loose again. You are trying to get her to realise that coming back isn't automatically the end of the fun! And of course never
ever scold her when she does deign to return - because she's not stupid and is less likely to recall if she thinks there's a telling-off as her only 'reward' for obedience.
So lots and lots of recall practice in as many different places as you can. It may be sensible to have her on a long line (a washing line or similar) for a time while you practice this. How long have you had her?