Not yet. They demo'd this at blizzcon with an immortal, but the functionality is set to be released in patch 1.2. Or at least I don't think it's possible yet. I could be wrong, or misunderstand what you want.
It's a nice TD. I've played bloons td before it, so I felt right at home. In most TD's I prefer a little more originality, but it seems fine the way it is.
I'm not sure I've actually played the official release, but it was fine every version after player 2 was fixed. Also, I bet most people here would say it's only around 8-10th place because it only has 2 player slots, but it's a fun map so that's fine with me cause it's a fun map.