Playing Matrix online on two different machines

The game is currently installed on my home PC, but I also have a mobile modem for my laptop and would like to play when away from home.

Is it possible to install this game on two machines at once to use them to play from the same account?

As long as your not trying to log into the same account on both your pc and laptop its perfectly fine.

I have MXO installed on 3 computers my main rig, my laptop and my rig and my parents house and as long as i keep my login details I can login to each one.

So yes it should be fine to install it on your lappie as well

If you want to keep personal settings, like your hotbars, you need to keep your Profiles folder synchronized.