The only way to print in more than one colour is
a) have a printer with more than one printhead, each with a different colour
b) or feed a different colour filament into a single printhead
c) use a single nylon filament and dye sections of it with different colours. You get this effect attached, using nylon filament.
http://taulman3d.com/main-features.html
Nylon 618 is a pure white polymer and fully capable of absorbing acid based dyes. 618 printed with 100% fill rivals its injection moulded equivalents in strength. All of the feature of nylon that we come to depend on are at the maximum in 618. Slippery surfaces, pliability, strength, non-scrape, chemical resistance and high thermal durability.