Calling for an audit is a fair bit away from calling to lock her up.
However he didn't just call for an audit [there already was the SOP one by the Auditor-General, who didn't like the accounting used, but couldn't say anything worse than that].
“If Kathleen Wynne tried to pull these kinds of shady tricks in private life,
then there would be a few more Liberals joining David Livingston in jail,' Ford said." [from the OP, my emphasis] Surely you're not suggesting Doug thinks only her underlings did bad things they should be jailed for. It was 'lock her up', plain as day.
Unlike the Auditor-General, who answers to the Leg, Doug's threat includes picking his own auditor beholden to him and his PCs. Like that'll boost confidence the province's government is in honest hands, and that any prosecution would be unbiased and fair.
In any case 'these shady tricks' were by a guy who worked for someone else on stuff Wynne wasn't directly connected to