I needed to be able to do this today. I have a rectangular 2:1 artwork that I am trying to map onto a coffeecup template. The artwork includes lots of powerclipped objects which are also grouped. The coffeecup template is an arc shape. I thought it would have been fairly simple. In reality I think I'd have to convert it to a bitmap and do it another way.[:S]
In the end I had to take it in to illustrator and do it with the competing software program!
Looking back over the forum, a few others have been requesting this feature for at least a few years now:
https://community.coreldraw.com/talk/coreldraw_graphics_suite_x6/f/705/t/38059