GenghisCon is not a UniSFA event, but many UniSFAns attend and have become involved in running it (though as yet no GenghisCon chair has been a UniSFAn or UWA Student).
Edit: Actually Msquared was the first GenghisCon president. He's never been a UWA student, but has been a UniSFAn.
GenghisCon is "a student-priced convention, filled with games, activities, panels, discussions, and workshops covering science fiction, fantasy, roleplaying, board games, and more."