Board Thread:Support Requests - Getting Technical/@comment-31066066-20170125053945/@comment-27345308-20170125061316

That means you'd have to use ChatHacks to create a multi-PM, and that would most likely bug a lot if you use the default chat client. You could also make a new wiki for moderator talk and ban from chat anybody that isn't a mod but I'm not sure how would ToU like that.

Or just switch to Discord.