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The clubs switch allegiances regularly. Souths Logan were with Canberra and Sunshine Coast with Manly Warringah over a decade ago, but that was killed when the sooks at the NSWRL chucked a tantrum and put an end to it because other Sydney NRL clubs wanted to follow suit and align with Queensland Cup clubs. It's another reason to hate Sydney and its backwards clubs and administrators who want to sit on a hill like a hillbilly because they live in 1932.
Clubs like Souths Logan, Ipswich Jets and Central Queensland Capras would benefit the most as direct feeder teams for a Perth-based NRL club.