If I understand you, when you write some message to anyone, it is returned back to your client, right ? If it is so, I don't know answer. I've never seen this situation.
Something you are hiding from me

Or you are connected to same account from two different client. In this case if you want to send a message to another client, you have to select resource of that client.

now this feature is not supported. And near future is unlikely to appear. Because I didn't think about it when I designed the structure of the project.