Hi @amireal and welcome to the forums
I hope you find what you're looking for here.
I have found the forums to be quite friendly and supportive
Unfortunately DID is still a controversial and stigmatised diagnosis. Some MH workers (psychiatrists, psychologists, MH nurse etc) still do not believe that it is "real". Fortunately, it is becoming more accepted by people as research continues. Most people accept dissociation but not at the DID end of the spectrum. The prevalence of DID is almost certainly under estimated because many/most people with DID do not tell other people.
I am not in Victoria, so have no suggestions.
You have not mentioned the underlying cause of your DID (or if you are aware of a cause), however DID is commonly associated with CSA (but also other childhood trauma)
Perhaps calling Blue Knot foundation - this is for survivors of chidhood sexual abuse, so they may be able to assist. They offer training programs to MH workers on DID. They also have some webinars for survivors.
Another possibility is 1800 Respect, or your local sexual assault service.
I hope you are able to find something suitable.