Hi mictee. General Assembly are expanding and I know that Melbourne is in their sights, so it's inevitable that they will run a similar event in Melbourne at some point.
That said, we might run something similar ourselves too. In the mean time, I can vouch for the regular [UX Melbourne events and know the helper team have big visions for this year, including more book club meets, more movie nights, and possibly some other, more ambitious, events. I know this because I am one of the helpers! Be sure to sign up to the Google Group(http://uxmelbourne.org) to stay informed.