As far as I can see, there's just no implementation of TrackIR compatibility at the moment.
I don't understand the decision not to include TrackIR compatibility - neither from a game design perspective, nor from a marketing perspective. A whole lot of players got their TrackIR back in the day specifically for DayZ and not including this in the release version basically means releasing an unfinished or incomplete game, that lacks the basic functionality that sets itself apart from other titles. Given the current share of the market of survival sandboxes, DayZ does not really stand out that much that missing out of opportunities to offer something unique can be afforded.
