Here is the link to track closures for 2015.
http://parkweb.vic.gov.au/safety/fire,-flood-and-other-closures/seasonal-road-closures2
Please be aware that many of the tracks that are closed are not gated, so do yourself a favour and check the areas you intend to go to, as authorities do not accept the excuse; " It wasnt gated, so I presumed it was open". Tallarook has many tracks that fall into this category, including Phone and Steep Tracks.
Not sure if it is gated now, but Aeroplane Tk in Toolangi is now also a seasonal closure.
Cheers