Hi Tim, Your sighting appears to be a male Sandalodes sp - I will reaffirm the distinguishing features between the 3 possible species of ACT and get back to you (unless someone else does before me :)) Thanks, Yumi
The field guide by Whyte and Anderson has a little information on Sandalodes species, but this is what I refer to for more detail if you are interested in taking a look at the differences yourself: http://www.arachne.org.au/_dbase_upl/Salticidae_zabka_13_sandalodes.pdf
I have also put the above link into the species description for Sandalodes sp (genus) just in case - all the best!