"Once the elections of 31 July were stolen by the current government -- which is illegitimate -- I knew that this was the end of the line," said Jacqueline Zwambila, who is aligned to Zimbabwe's opposition Movement for Democratic Change (MDC).
"End of the line for the people of Zimbabwe ... And for people like me, who were appointed by the ex-prime minister Morgan Tsvangirai," Zwambila said in a video posted on the Canberra Times website.
Zimbabwean opposition leader Tsvangirai shared power with President Robert Mugabe until elections at the end of July.
Tsvangirai's party controlled the finance ministry after he formed a unity government with Mugabe in 2009 following violent disputed polls.
The power-sharing deal ended when the veteran president won the July 31 polls with 61 per cent against his rival's 34, in a vote some international observers questioned.