It looks like the corallites are all raised and individual. Interesting.
The Monti species it resembles to me are (using the individual looking raised corallites)
M. grisea
M. peltiformis
M. effusa
All can be found in Australia. Of course, I could be way off.
I checked Porites, but most of them have more regular corallite walls than what I'm seeing in the first pic. I didn't see anything that made me really wonder (which, of course, means nothing, really).