In accordance with some embodiments, a secure local application communication method is performed at a first apparatus that includes a housing arranged to hold a second apparatus, a controller, a communication interface, and a non-transitory memory storing a matrix. The secure local application communication method includes detecting, via the communication interface, a request originating from a first application executing on the second apparatus to communicate with a second application on the second apparatus. The method further includes determining whether or not to allow the request based on the matrix. The method additionally includes allowing transportation of packets from the first application to the second application in accordance with a determination of allowing the request.