You can create a selection tag of the polygons you want to assign with a different material ( or with the same material but a different wrapping method)
1. select the polygons
2. go selection > set selection
3. a selection tag appears in the object tab
!!! if you want to create an additional polygon-selection tag you have to create a null object firdt and temporarily drag the existing selection tag to it, because 4d replaces the old selection tag with the new one.
4. click on the material tag you want to assign to the selection and just drag the selection tag into the selection field (material tag properties )