Western Australia is a big place (even Perth is fairly spread out), so local permaculture groups provide people with greater opportunities to share experiences, celebrate achievements (and share surplus) as well as overcome challenges.
Belonging to a local group can also provide inspiration and motivation, hands-on practical help, and opportunities to share equipment or swap seeds and cuttings. Lastly, and maybe of greatest value, local groups can provide a sense of comradeship and connectedness.