I have a party on FTBTeams and Open Parties and Claims and if aplayer is in the ftbteams party, the barrier setting is ignored. Is tehre a way to disable that integration?

No, I didn't think anyone would want that.
Why are you on a team with someone you don't want to pass the barrier? Genuine question.

You can enable protection from your teammates and allies (from any party system) in your player config, by the way. The options for it are some of the first ones there. Not sure if that's what you're looking for, or if it's genuinely about FTB Teams specifically.