No. The Link only gets this information from the Sylphyo. As far as I understand Aodyo's comments (we have discussed such things here before), the communication from the Sylphyo to the Link is not MIDI, so we cannot simulate it by sending MIDI data.
By the way, I don't know of any device where you can remotely set the MIDI channel on the fly by sending MIDI commands.
If you want to change the transmit channel or send on multiple channels, you have to do it the traditional way, after the Link, with hardware or software. The receiving channel is only changeable with the Sylphyo.