PR and dual citizens can be prevented from leaving - they have to follow the same criteria as Aussie citizens (apply for an exemption).
If you hold citizenship for somewhere else its really hard for Aus Govt to prove you aren't leaving permanently or a for a long period, as you dont need a visa or job lined up or even a lease to return to the country of your citizenship. You just say your are staying with family.
I know 4 people who have left by claiming they were travelling to care for a loved one and also have a friend that went to Greek islands for a "medical procedure", all said very easy to leave because of their EU passports. Of those 5 only one was away longer than 8 weeks, the others managed to get commercial flights back as needed.
Whilst Aus govt could potentially restrict a dual citizen, Im not sure they can actually stop a PR from leaving, they can of course cancel their residency visa to stop them from coming back (a threat that would bet a better deterrent for unnecessary travel than fines that they will never pay)..
I hope the article is correct in that its now much tougher for them to leave now.
Was also talking to ex-colleague earlier today from my previous employer who said with the new return to office minimum of 2 days a week policy in Melbourne office , it became apparent a number of the team had gone to India to escape Melbourne Lockdown last winter, were working remotely from India (whilst pretending to be wfh in Melbourne to keep Aussie salary), and employer only found out when they had to admit they couldnt attend the office last month.
That is their choice of job, who is the government to make you unemployed when gainful employment exists, and there are procedures to follow to keep the wider community safe on return (charged to the user)? These are people earning money and paying tax in this country, not freeloaders.
Well apparently IPL players are calling for govt sponsored repatriation flights to get home now, when they knowingly opted to go to the country with the worst infection rate. I dont see why tax papers should subside their poor judgement. And just how much of their overseas IPL salaries are taxed here in Australia?
WRT Olympic Athletes they don't pay their own way to get to the games or to quarantine on return, tax payers foot the bill for them (and all the hangers on).