customising the theme for each category / or container node while using the category module ??

Well, as the title says ... I would like to change the way the site looks based on wich container is chosen (while using the category module)... is this possible ? And if yes how is this done ?

Aside from that... if this is not possible... is it maybe possible to change only the view of the content listing according to the selected container / category node ???

Gdev