Though your link doesn't quite say that, there are strong advocates of GOFROC (Doherty, Subbarao and others) at the Peter Doherty Institute, Melbourne. Moreover, one of the leading Australian virologists, Eddie Holmes, is a long-term collaborator of WIV and other Chinese institutes. But these facts by themselves are not indicative of guilt or complicity.
What has been missing is an independent investigation of both possibilities (lab related and zoonotic spillover).
The baffling reluctance of the US and China to call for such an investigation is very disturbing. However, to talk about guilt is premature at this stage.