Some Shotgun Action down under.

Watch "Wild Pigs. Boars. Eradication using. Spotter Plane. Benelli M2" on YouTube

Frostbite said:

I thought semis where strictly forbidden down under. How misinformed I was. Nice shooting! Looks like tons of fun.

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They are classed as Prohibited but you can get a license to use them for a few reasons.
Farmers can use semi auto shotguns with mag capacitys of no more than 5. Contract Shooters like myself can buy Semi Auto Centerfires like AR15's. Which is a Cat D license. Theres probably only a few hundred people in Australia with Cat D. I've attached the license catogorys.
So yes you can have them but its bloody hard to get licensed for them.