I think this individual fits with P. venusta (female); distinctive body shape, single white stripe on the abdomen, very long pedipalps and other features overlapping with the image on the bottom left of p130 (Whyte & Anderson, 2017) arachne.org doesn't seem to have any photos, but findaspider.org has an image for male and female. ALA also has a few. Unfortunately I wasn't able to access Raven's revision on Corinnidae which should include information on P. venusta (https://www.biotaxa.org/Zootaxa/article/view/zootaxa.3958.1.1) and it seems like ALA has limited sightings, however I still think it matches! Distribution is south-eastern Australia and they seem to be scattered through NSW so finding on in ACT isn't too unlikely, particularly given how little information there seems to be on it.