Pretty much, yes.
The Army isn't "enforcing lockdown"
There are 300 unarmed soldiers assisting with doorknocking people in Sydney who are subject to self-isolation - in other words, those who have been in contact with an infected person or the like, who are required to quarantine at home.
I think that it is an inappropriate use of the Army in aid of the civil power, but it is not a case of the Army "enforcing" anything, and we don't have armed soldiers on the streets. Not like, say, you have had in the US.
It is also worth saying that there are specific provisions under the Commonwealth Constitution and Defence Act 1903 (Cth) which would stand in the way of armed soldiers enforcing State laws.
But hey, you believe what you want to believe ;-).
