I believe you can with the ti watches. However, we had major issues getting more than one myo to respond at the same time. We tested with two, since we only have two, and the results were poor. I believe it had something to do with rf interference of each other - unless it was driver related. If so, perhaps it's resolved.

ARC limits myo to one to prevent ppl from experiencing that and complaining to ezrobot. Once we very it works in the future, we will remove the limit.

Using the sdk or a custom plugin, you can have as many myo's as you wish for expirementing.