In theory possible, but your client would need to allow to control which relay is for read-only/write-only.
And then you probably will run into a problem at some time 🤔
If you publish on Relay X only, but never read from it, I don’t think you’ll see your own content then again.
So far, relays don’t talk with each other. Clients are in charge to distribute data.
(I hope I got that right. Please correct me if I‘m wrong).