How do I make a hotspot wifi client to use a different interface?

I am using coovachilli on openwrt running on RUT955.
I have a user get the captive portal pop up and use the 3g connection at this point. Then i auth the user with "chilli_query auth". Now i want to move the "Authed" users to use the LAN connection and not the 3g. Is this something that Chilli does or is this firewall or routing related. I need to move just a few users and not the whole hotspot to LAN.

Can this be done? Any ideas on command line?