Static IP over hotspot interface for wireless users

Hello,

I need to know how can I implement Static IP route on the same interface where I am running
hotspot & pppoe for my wireless customer already ?

My customer can access hotspot page and use radius authentication & pppoe also with
radius authentication. I want only some specific users can use static IP if I route them on the same interface, i.e WLAN1 .

Any suggestion ?

Regards
Litu
Sylhet
Bangladesh