This looks like the lonely D. punctata from last year. The yellow labellum callus and the uniform purple colouring (as opposed to blotchy) separates D. punctata from D. dendrobioides.
As an orchid moderator I can see the locations of orchids which is how I am able to tell it's around the same place as a record from last year. This is quite an uncommon species in the ACT, so it is good to see it has persisted for another year.
The Canberra spider orchid gets the special treatment because it is a threatened species. While uncommon in our area, this species is not a listed threatened species, and is generally widespread through NSW. There is limited funding for orchid conservation so it is unlikely the purple donkey orchid will be a target of such efforts. We will just have to hope there are a few more in the area and that they pollinate.