2MIDI has two different ways of assigning the MIDI channels for the conversion... MOD channel, and sample based allocation. The methods are cumulative, the effect of one is added to the other. The two methods are described below, with examples.
In this example, the notes played on MOD channel 0 can only be converted to MIDI channels 1, 2 and 3.
In this example, the notes played with sample 14.0 can only be converted to MIDI channels 2, 3, 4 and 5.
If both these example settings were made together, then the cumulative effect would be that if sample 14.0 was played on MOD channel 0, the notes could only be converted to MIDI channels 2 and 3.