Hi,
MIDI Inserts are a post processes. So you would have the data in one track anyway.
In Cubase Pro, there is a Dissolve Part function. Which would also solve it. You can dissolve by Channel or dissolve by Pitch. But as far as I know, this is not Cubase Elements feature.
In any case you can change the colors in the Key Editor so that one Channel data has the same color. So you can see easy the channel.