No. The portal is a usb device. The x-box is a corded usb. The others (wii, 3ds, ps3, & pc) are all cordless usb. Either way, just "plug'n'play". Internet access adds a few extras but is not needed to play.
"How far can portal be from wii console?"......... Super far. Far enough that your TV would be out of sight. It is a different technology than say, your TV remote, if that was what you were thinking. Get it, you won't regret it.