Actually your article is wrong with this quote – “Same-sex couples cannot yet adopt in Australia”.
Western Australia and the ACT (Australian Capital Territory) DO ALLOW “any 2 adults” to adopt children (regardless if they are biological related to you or someones else’s children)!!!!!
Tasmania only allows to adopt your own children – no someones elses.
Adoption comes under state/territory law. Marriage comes under federal law.
Confusing, I know!!!!????