Alleway says it has been "tough" not playing much for the Australian national team or National Women Soccer League's Orlando Pride in the US.
"I need to get back in form and prove to people that I'm still young enough to be out there," she told the Women's World Football Show podcast.
The 27-year-old debuted for the Matildas in 2010 and has earned 49 caps - but only one was this year, against Brazil.
She was waived from Orlando in July to pursue other opportunities, after joining the club in 2016.
Alleway said she will look at other international leagues next year, with Europe on her radar.
But playing well in this W-League season is her focus for now, claiming: " (I want to) do all I can for this team and really get back in a good stead," she said.
Alleway is returning to the Victory after playing with them between 2008 and 2010, followed by stints at Brisbane Roar (2010-2015) and Melbourne City (2015-2017).
Victory claimed a 2-1 win against Canberra United in the league's opening round and will face their cross-city rivals on Friday night.