[Inkscape-user] Fill with multiple outline segments

I'd like to be able to create a single filled object whose outline has multiple segments, with the multiple segments having different colours and styles.

I have a fudged example at http://audilab.bmed.mcgill.ca/~funnell/test_fill_multsegs.svg where I've overlaid 2 objects to get the desired visual effect.

Is there a way to do this in such a way that I can later edit the shape of the outline and have the fill adjusted automatically?

Thanks.