Yes. You can put as many textures on an object as you want. They show up as Texture Tags in the Object Manager. The left one is the bottom texture, the ones to the right (if there are more than one) are above it. Tops ones will block out the lower ones unless the top textures have an alpha channel or the textures are mixed.
Check out the help files under Reference/Object Manager/Tags Menu/Cinema4D tags/Texture Tag/Tag Properties look for Texture Layering and/or Mix Textures.