Computer Alternative IP [Cable Modem+Hub]

[Hydra]

I have 2 computers connected to hub that is connected to a cable modem, now when i try to move stuff from one computer to another the speeds are capped by the cable modem limitations (common problem)


Is it possible to make some specific site force use computers alternative IP settings (settings that are for local area network)

I can connect to other computer using it's alternative IP and get Max downspeed no problem, but it's still capped by the download speed of cable modem (it handles other computer as LAN computer, but computer i'm connecting from, as internet computer that is connecting through inter)

If there would be a way to force using lan settings ( alternative settings) it would bypass this problem and have LAN <-> LAN connection. It would help alot, cause i dont want to buy a switch