Australia has been closed to tourists for most of the pandemic. Citizens are not allowed to leave unless under special circumstances or on a special visa.
Requirements
Citizens who return to the country must quarantine for 2 weeks in a hotel that they must pay for.
Restrictions
Masks are required in public areas depending on the state. Some states have strict lockdowns and you’re only allowed 5km from your home and 0nly for an hour at a time, unless for essential reasons.