I captured a photograph in the street.
The photograph includes people who I don't know.
There is nothing in the photograph that I believe can offend anybody (e.g. no nude or illegal act).
I just like this photograph.
Is it legal to publish the photograph for commercial use without permissions from the subjects appear in the photograph?
The photo was taken in Australia. I want to publish it as a demo-photo as part of a photo-editing App (distributed internationally).
Edit: Please note that the question marked as possible duplicate does not relate specifically about someone captured in Australia, and does not specific to my commercial usage context.