Yes I agree E.dallachyana, its not a case of a name change however both taxa are accepted. E.drummondii is found in drier sites further west, I'm pretty sure we only have E.dallachyana in the ACT (though as per usual I am hesitant to use the census as the only source, particularly as it is a few years out of date now). In order to accurately tell the two apart you will need the seed capsule.