Separatism conventionally refers to full political separation, including secessionism; groups simply seeking greater autonomy are not separatist as such.
[1] Various attempts for secession have occurred in Western Australia, including the 1933 Western Australian secession referendum, and a number of more recent movements have continued proposing and pushing for independence, including the Western Australia Secessionist Movement [2] Murrawarri Republic is a micronation in Australia created by an ethnic/racial Indigenous group that has been pushing for independence of Indigenous Australians.
[3][4] The Euahlayi Peoples Republic is an Aboriginal micronation that declared independence from Australia in 2013.
[4] The Wiradjuri Central West Republic is an Aboriginal micronation that declared independence from Australia in 2014.
Tasmania, historically an independent colony which joined the Commonwealth of Australia which has had various support groups that have proposed secessionism in Tasmania, with Labor Premier Doug Lowe and Liberal Premier Robin Gray seriously considered secession.