Actually, kind of. It would involve appealing to other organized crime outfits that the given mob interacts with to have them reign in their behavior. Group A might think they can bully group B, and maybe they can, but they can't bully groups C, D, E, and F, who all rely on each other to not attract unwanted attention from the authorities or the public.

See: https://en.wikipedia.org/wiki/Apalachin_meeting

not quite suing, but it was a diplomatic way of resolving disputes and preventing them.

I think they would just kill each other, or take contracts out on each other for reneging on verbal agreements.