I forget, did they get rid of From-Tos? That might do what you're looking for.
Could also set SMD neck-down rules, not the prettiest (e.g., fat 25 mil trace comes in, necks down to 6 entering the pad, another 6 leaves the pad, poofs up to 25 then immediately back down to 6 entering the next pad over..) but maybe something easy.
Also SMD fanout, depending on if that applies to the relevant component types.
If you truly want to alter the netlist, you can add net ties to the schematic. Usually represented as zero-ohm jumpers, with a footprint that contains two pads and shorting copper between them. Note that they will cause errors in subsequent netlist checks (PCB fab netlist verification, possibly flying probe assy test).
Tim