The Tasmanian Tree Fern is more cold tolerant than some other tree ferns including what is often called the Australian Tree Fern Cyathea cooperi.
It does still need to be planted in a sheltered position, in good soil and good moisture, and yes it is suited to growing in containers.
Protecting The Tasmanian Tree Fern in Winter
The top where the new fronds emerge is the most frost sensitive part then the fronds and then the trunk which is fairest hardy. If temperature drop down to around 20f the fronds will die back.
The best way to protect the crown and new fronds from cold temperatures if to use hessian or burlap and cover the centre of the crown. A layer of plastic wrap over the burlap and then something to hold all of that down. Do this in mid too late fall and remove it after the danger of frosts has passed.
Remember to water you tree fern, the trunk and the roots as well as the crown, this is a plant that does not like to dry out. Also don’t handle the new fronds as this can damage them and hem them black.
Dicksonia antarctica has tighter foliage on the fronds than Cyathea cooperi.