They are a difficult group seperated largely by distribution and detailed features of the infloresence. If two species which form similarly grow in the same area it is often too difficult to assign a species level ID when the plant is not in flower, we are lucky in that regard in the ACT having only X.glauca. Having said that, I reckon your plant is probably Xanthorrhoea resinosa based on form, locality and what I belive are distinct velvety-like brown spikes.
I also happen to have an expert contact for this genus who may be able to take this further if you would be happy to contact him through Inat.