Yes, but it is not an easy process.
Getting passage out of the Free State as a Tylander is difficult, setting up residence in Commonwealth territory is even more so. Commonwealth law typically requires migrants to be able to support themselves for a given period of time before they can receive any help from the government. Since the Commonwealth is still recovering from the War, it doesn't want what it considers an 'extra drain on resources'.
That said, it has been running work programmes in the Treaty Ports. In exchange for doing some work, Tylanders receive a Commonwealth standard ration and a basic wage as well as access to the Commonwealth's version of the NAAFI hops and cafes. These are extremely popular and the Commonwealth has had to put people's names onto a waiting list for when they require extra workers.