MIDI Channel Mapping to VST Plugins

On my MIDI keyboard I can change the MIDI channel on which outputs notes. At the moment it is sending notes on Channel 3. I have VST plugin loaded but I only seem to be able to send data on specific channels to the plugin. Is it not possible to that when notes are received on channel 3 that they transmitted on channel 3 to the plugin, likewise if notes are received on channel 2 they are transmitted to channel 2 on the plugin?

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