Can you use the CSA team ability more than once in one turn. This came up in a game so I'm wondering.

I believe not. You can only use the CSA ability once during your turn, and once during your opponent(s)' turns. I tried that the first time I played Superwoman, only to be shot down by the judge! I did have V Superwoman, Ultraman and LE Destiny on my team, though, so PC was not short in supply by any means!

it follows the same usage restrictions as normal PC

It can also be Outwitted just like any other power that is showing on your dial.

And it can't be copied by wild cards!!!

(I feel really special for pointing that one out!!!)