Can I apply for a DVT visa from Australia using UK bank statements and employment?

Hi fellow Brit here, I applied in London and was approved. I don't envisage you having issues on that basis as long as you apply in Aus & remain in Aus for the duration of your application. I think the optics would be better if you was in the UK and applying from your UK address certainly, but plenty of people have applied from other countries and been successful. If you're able to wait until back in the UK I would recommend that as everything will line up nicely in relation to your documents and location but if not... all should still be fine from Australia.