You can use the software on more than two computers but will have to deactivate one of them to switch between computers. You deactivate by either signing out from one of the products (like within Photoshop CC 2014) using Help > Sign-out or from the Creative Cloud app by going to the gear icon in the top right which opens a menu with Preferences, from Preferences go to the General section > Account Tab and use the sign out button.
Hope that helps,
That helps. Thanks:)