Route incomming iax trunk NO-DID

hello expert .
i have a newbie question
i have registered with 2 IAX providers .
i am trying to setup inbound route rules , but it seems that the IAX provider does pass DID .
is there a way to create an alternate rule that will enable me to create separate inbound rules for each of my iax provider trunk .
if someone call to the my IAX numbers from lets say a cellphone i would like to create 2 inbound rules :

inbound 1 will forward to extension 200
inbound 2 will forward to extension 300

thank you