This event is not run by Sydney Cohousing, but is promoted here for your interest:

An opportunity to hear what the landscape for eco-living in communities currently looks like in Australia and what the potential is to get involved – either existing communities or the pioneers creating new communities and also those who are retro-fitting old buildings to regenerate communities.  Join Narara Ecovillage member, Tanya Mottl and Trudy Juriansz of the Ecovillage Network Australia as they host a panel of movers and shakers, innovating ways to create a regenerative future.

https://events.humanitix.com/ecovillages-incubators-for-sustainable-transformation-altercop-30-day-2