Anyone know how to send a message to a single user?

[rasselll]

like the title says, if you have done it, can you send me your source code.

[fritexvz]

It is one to one for now, anyone joins - all see.

Would need modifications in JSNON model to include the sender/receiver's ID by device or UID, later on to chat with one specific person or even one-to-one (more people)?