I had a look at the website of Wat Buddha Dhamma: http://www.wbd.org.au/
Nowhere I find Ayya Khema mentioned.
I was a little surprised, after all she founded it, with Phra Kantipalo.
Am I mistaken, is this maybe another Wat Buddha Dhamma?
This is the Wat Buddha Dhamma, @Leon74. Ayya Khema was not yet a nun when it was founded. There is a picture of her in one of the guest rooms, but not in the Dhamma hall nor in the dana sala.
Like many other places initiated by Ayya Khema, Wat Buddha Dhamma is today a monks monastery, and nuns can only live there temporarily as guests.