Did Ray Lindwall play for Oz in League and cricket?
No - just 1st Grade for St George.
I can't think of any multi-sport Aust rep + Kangaroo other than Dick Thornett.
Didnt Lindwall play for NSW in rugby league aswell?
I can remember some South African went from playing golf to playing Tennis (or the other way around) and another South African played in the cricket world Cup for South African last year and also played for them in the Rugby Union world cup.
Also Anthony Mundine... played for Australia in League and now in boxing. (Yes i'm aware, boxing is not a team sport but he does represent Australia).