It would be very useful to be able to match additionally head (or port) in the output directive (probably output would then need 2 fields, the "identifier" as it is now (which matches either head or description, and additionally head or port that matches the string shown in (DP-2 via HDMI) in the description query, or the plain monitor name (e.g. DP-2)).

The use case is that like this one could select e.g. "left" or "right" for a plugged in monitor based on which port it is plugged in to.

It would probably also solve standing issues #30 and improve behaviour when regex matching is implemented.