That is correct, Controller does not work like that. You can check the interface and port functions here: http://www.cisco.com/c/en/us/td/docs/wireless/controller/8-2/config-guide/b_cg82/b_cg82_chapter_01100.html

Mohammad,   Thanks for sharing your question, I think you need to clarify this a little more, however if I understand correclty you are asking if its possible to use the interface of the vlan on the WLC as the source IP when clients connecting to a S...