The Sydney protests against the lockdowns made international news. It was odd for this violence, such as pelting bottles at police, and I think in at least one case beating an officer to unconsciousness, to occur in Australia. The last time we saw this was during the 1960s anti-Vietnam War protests, mainly by the Left. Of course, in recent times there have been the BLM/antifa protests, but most of the violence was in the US. Nevertheless, after pouring over the footage, the attackers to my eyes do not have the appearance of conservatives, and have a distinctive Leftist look about them. If I was able to smell them, with my dog-like sense of smell, I could give a positive ID, for sure. My guess is that international socialists and commos were there to stir up trouble, like they did in the US on January 6. Unfortunately, good conservative folk, only concerned about freedom, will get tarred too. I think any protest breaking the law should be avoided at all costs. Think of alternatives, as the Left will lead you on the road to legal hell.
Thus, the police may have been technically mistaken characterising the rioters as anarchists, when I think communists would be more accurate. If you want to find the trouble makers, do a quick trip to the universities.