I think the issue will be getting to 80% (of 16 and overs). That translates into around 64% of the total population. Very few countries aroundAt the current rate we are due to hit 70% first dose in 4 days (https://covidlive.com.au/vic). We should get some modest easing then - 10km limit the most notable I think.
As for ending lockdown, I speculate that won't come until 80% double dosed, which is harder to predict (function of first doses and what intervals are used)
We are sitting at 40.8% double dose right now, which we sat at for first doses around the start of August (https://chrisbillington.net/aus_vaccinations.html#state). So based on that we should reach 80% double dose about 6 weeks after hitting it for first doses. We are currently projected to hit that in 16 days
the world have actually reached that. NSW is ahead of Victoria now but I'd expect the gap to close as the case/death numbers in Vic increase.
But when they stop increasing so will the vaccination numbers.
Here in Sydney I don't think it's taken people very long to get a bit blase about 1200-1500 cases and 3-10 deaths every day and the number
of vaccinations is increasing every week, but at a lower rate of increase than a few weeks ago. Because the lockdowns mean different things
in different states, easing of restrictions doesn't mean as much in some states. I think in the end 80% will become 70% as the people of the
two most populous states (NSW & Vic with a combined 60% of Australia's population) will be well and truly over the lockdowns in two months
time and the political leaders on both sides will be very aware of that if they aren't already.