Australia's government today proposed new laws that would prevent extremist Australians from returning home for up to two years, as the country prepares for the repatriation of Islamic State group supporters from the West Asia.<br />''<br />'' Home Affairs Minister Peter Dutton introduced the legislation based on British law as part of a raft of counter-terrorism and asylum seeker bills in the first parliamentary session since elections in May.<br />'' <br />''<span style="color: #222222;">Mr Dutton said, orders could also apply to Australians who intelligence agencies assess to be a risk to security for reasons related to politically motivated violence. <br />''<br />''He said, 230 Australians had flown to Syria and Iraq to fight with extremist groups since 2012.</span><br />