There may only be one venture fund locally, but there are several around Australia that have invested in startups out of Perth.
Also, That one VC (Yuuwa for those playing along at home) have invested in companies other than Filter Squad (Agworld being one of them - very much a tech startup, despite focusing on very non-traditional web / mobile audiences).
Likewise, Yuuwa invested in a seed round pretty early in Filter Squad (I can't remember exactly when since I wasn't around at that point) - it was just their follow up that was a bit later.