what you're looking for is QoS. Too bad only corporate routers/some gaming router have that function. If you have an old PC lying around I suppose you could turn that into your own home-brew router though. Not exactly discrete and power saving though
once upon a midnight dreary, while i pron surfed, weak and weary, over many a strange and spurious site of ' hot xxx galore'. While i clicked my fav'rite bookmark, suddenly there came a warning, and my heart was filled with mourning, mourning for my dear amour, " 'Tis not possible!", i muttered, " give me back my free hardcore!"..... quoth the server, 404.