Yes Ian, it is up close to the lamp, so the colouration is incorrect. I have records of both D. pinguis and D. quadriguttata from here. This one is closer to D. quadriguttata but I suspect inconclusive
The two forewing submarginal lines match those on several specimens of D. pinguis on BOLD. A group of their specimens of this species seem to come from both sides of the QLD-NSW border.
Yes the submarginal dashed lines are distinctive. I have not found those marks on any online specimens. Although I agree with don that some specimens on Bold show this feature faintly.. Pity we don't have another image.