djiing and licenses

i dont know if this topic has been brought up be4.... and i dont know if this is the right forum for the subject. if its wrong i appologize to the moderators and administrators of TH.com. n e ways this question crossed my mind today and i was wondering if any1 new anything extra about the subject. i read somewhere that if ur getting paid to dj it is illegal to use some1 elses music even if uve bought a legit cd from the music store. i mean i know u need liscenses to play other producers music. but does this apply in leb i mean like if some dj in lebanon played a track for lets say adymus without a license to play it would they get in trouble? also i know that this is a problem for djs who are getting paid, but what if the dj didnt get paid would it still be a problem to play unlicensed music?