Xbee Communication

i know that xbee communicate over the air, but does the arduino know where the information came from. Do the information have a transmitted from part so i go put this in my sketch. because i have 5 ardunios that are conected in a configeration i have a planned sketch for each that say that if a information can from a certain arduino it would do a certain opperation. so if slave arduino 1 has a massage from master it would send a text file containing the information needed. then if the master got the information from slave 1 it would know that it would have to do another opperation.

my question is does the information or the send a protocol saying where the information has come from?

It really isn't necessary to open a new thread every time a thought pops into your head. Keep all your questions in one thread.