KiCad: can I give different names to different parts of the same net?
Create a part out of two connected SMT pads, and connect it between two parts of a net. Each pad will be a different port, and thus will allow you to change the net, but the part itself will just be a small rectangle on the board between different trace widths (i.e. a short). If possible, remember to take the solder mask regions out of the footprint (so that the entire footprint gets solder mask).