A federal government appointed board will decide whether to strip the citizenship of dual-nationals believed to be involved in terrorism.
Immigration Minister Peter Dutton confirmed on Friday the board met in February and would work with several agencies, including Australian spies and government departments, to send dual citizens back to their country of origin.
The government believes about 190 Australians - some of them young people - are supporting extremism through funding or other means.
"Parents are horrified at the thought that their 17 or 18-year-old son or daughter could be radicalised online within a matter of weeks," Mr Dutton told reporters in Melbourne.
"But there is a very significant penalty to pay if people are involved in terrorist activities and they're a dual national, they have the potential to lose their Australian citizenship."
The recently-introduced laws don't apply to children under the age of 14, unless they've been convicted of a criminal offence.
A child whose parent supported terrorism wouldn't lose their citizenship, Mr Dutton said.
