I would only set boundaries that you can enforce. Telling your husband not to comm with the OW while around your daughter can be enforced by you only when he is with the two of you on your turf or if you have custody at the time you are together with H. Then if he does it, you can ask him to leave or you can leave with your daughter in tow.
Just as the others are saying, and since he's moved out, I'd go totally silent on him while he continues his affair.
