This spider of the Sparassidae family is known as the Shield spider or Badge Hunstman. It hunts at night, usually on tree trunks and among foliage. By day it will be hidden away under some loose bark or even under stones. It has been known to occasionally come into houses. The one photographed below was certainly trying to come into my house as it was found on the back screen door. Fortunately it couldn't figure out how to pull the handle :-)
These spiders are fairly widespread in Tasmania and also occur on the mainland. The colour can range from yellowish brown to orange. The female's body length can be up to 22mm and the male 17mm. It has two straight rows of eyes with the eyes at the back being smaller. Between the two rows of eyes are some yellowish white hairs which to me gives the appearance of eye brows.
Another identifying feature is the 'badge' on the ventral surface of the abdomen. While this badge can vary a bit, it basically consists of a black area with two white spots. As I did not fancy holding the spider on it's back while taking it's photo, I have instead drawn a rough picture of the 'badge' which I have included below.
At this time of year (Sep/Oct) the female will make a nest by joining together some leaves or grass and within this she makes her egg-sac.
(Click on Photos to Enlarge)