Hi DesuDeus - in the mesh options dialog if you uncheck "Weld vertices along edges", the meshes for each surface in every object will not be connected into the same vertices along common edges - that keeps the mesh to be separate pieces and you can then use polygon processing functions in your poly modeler to break the "islands" apart.

Also if you have multiple objects with the same name and you want to keep them as separate objects rather than having them combined, there is a checkbox option for that under Options > Import/Export > "Combine same named objects" (at the top).

If neither of those is what you're looking for then I guess I need some more explanation of what you would be trying to do.

- Michael