What Australian swimmer received the most medals at the Beijing 2008 Olympics?

That was Ian Thorpe who won 5 medals (3 gold, 2 silver) at the 2000 Games. Thorpe's gold medals came in the 400 meter freestyle, 4x100 meter freestyle relay, and the 4x200 meter freestyle relay. His silver medals came in the 200 meter freestyle and the 4x100 meter medley relay.