Hello and

Sounds like a tough situation for you... . and on reading, I'm not exactly clear on your goal(s) with your wife. I think I see something of these in your post(s)... .
- Get your wife into the marriagemax program
- Get your wife to move back in with you
- Get your wife to break off EA with her ex
- Get more access to your daughters
- Communicate with her differently
- Something else I'm missing?
We will probably give you better support here if you are clear on what you are working on, and what priority it is.
My question is how do I move forward setting limits? She is limiting visitation already with the girls. She seems to be opening up more as normal as I get stronger( 3rd time she moved out). Looking For things I can do for reactions to her not wanting to stop contact. There is really now way to check on this anymore. She now knows not to use her phone to communicate. She can just use her parents land line now. She is 3 hrs. away. I don't want to put leaving on the table.
Setting limits (and communicating them to your partner) doesn't sound like something that works with a pwBPD.
If you say to her "You can't do x" or "You must do y", your odds of getting the desired results are very poor.
What does work very well is enforcing boundaries. They sound like "If you do X, I will do Y to protect myself."
Some actions lend themselves to (relatively) easy and effective boundaries, like "If you verbally abuse me, I will leave the conversation immediately (as a way to protect myself from being subject to the abuse)."
Others are much tougher like "If you cheat on me, I will leave." This does work--You are protected from further cheating... . but the cost is obviously extremely high, often too high.
As far as this sort of boundary enforcement
But I need this behavior to stop if we are going to made it.
While this may be true, it isn't very helpful for you to look at it this way.
The only behavior you can stop is your own behavior--you have absolutely no control over her behavior. Trying will just make things difficult for both you and her.