In Simulink, can the Local IP port of the Raspberry Pi UDP send block be set to send from a specific IP port?

I am using the raspberry pi to communicate via UDP to/from a external device. I send a UDP packet to request the external device to start sending data and the external device starts sending data back to the requesting IP address and IP port. Therefore to be able to receive the data correctly, I need to be able to set a specific local IP port that the UDP send block sends from. This is so that I can receive the data with a UDP receive block set to that specific local port. Any help would be appreciated?