To do this, you need a tool to share your USB over the Internet. Perhaps you could try http://www.eltima.com/products/usb-over-network-mac/ or http://www.net-usb.com
But you probably need administrator rights that you won't get with macincloud. Perhaps you can try another provider, for example http://xcodeclub.com
You can also ask the FAQ for macincloud:
How can I easily test my applications on my own iOS equipment using the MacinCloud service?
Although the remote Mac server does not know about your iOS devices connected to your local computer, there is a workaround:
We strongly encourage developers to use the free service provided by TestFlightApp.com, which allows you to easily provide your iOS device for developing and distributing your application on iOS devices for testing.
For more information, visit TestFlightApp.com. You will need to register for a free developer account on your website in order to use this service.
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