Xbee Shield - Turning jumper settings into ON/OFF (XBEE/USB) manual switch
Of course it's possible!

You just need a 3-pin switch that maps exactly the pins of the jumpers, and that commutes from the right to the left pin.

These are some examples...

Then, to connect it I would suggest to use a connector, so you can always come back to the jumpers way, but this way you usually can't disable both...there are also 3-positions switches that allow also to leave the contacts open.

UPDATE: I don't understand well the part with numbers; you need to keep the 2 jumpers separate, so you can use 2 switches and try to mechanically switch them simultaneously, or maybe you can find a switch that can simultaneously command 2 channels...