It's great to see one actually reproducing in nature - all of the pods in the area I check out occasionally (connecting area between Mts Ainslie & Majura, mostly NE of Bragg St. park) got eaten, and there weren't very many to begin with.
To help with your tree id project, you may like to look at https://www.flickr.com/photos/61627737@N03/albums/72157627244893256/ which shows many of the species on Mt Majura. And see https://majura.org/wp-content/uploads/2011/07/Trees-of-Mt-Majura-2.1.pdf which helps with ids for gum trees.
Definitely Coprosma hirtella, plant is female. I haven't noticed flowers and fruit at the same time before. Some of the leaves appear to possibly show evidence of infection by a rust pathogen.