Unfortunately the feature is not supported.
If multicolumn is needed for a single page only, you may play with undocumented
It "understands" the following attributes (numbers are default values):
The purpose of the tag is to try to fit given nested content into a box, limited by height/width. It scales the content down till scalelimit
. If a single column is not sufficient for the content, it tries to layout into 2 columns etc.