Comment 1 for bug 699629

Yes, it is possible --- in your local copy; which will introduce file format incompatibility with upstream version.

On main idea --- you probably know, this is not how PCB works now; the nets assignments (of all objects except pins and pads, i.e. arcs, lines and polygons) are done as a result of connectivity checks. I don't feel changing this would give a great advantage.

Kind regards,