A quick update, maybe useful for other readers:

In ZBrush, the non-customizable navigation controls are: RMB = rotate view, Ctrl + RMB = zoom view, Alt/Option + RMB = pan view.

To have corresponding pen tablet navigation controls between Blender, MoI and ZBrush, I've done the following on my Mac (but I guess it's applicable to Windows Wacom users as well):

1: Customized the MMB side-button of my Wacom pen to be Alt/Option + RMB (= pan in ZBrush) only when the ZBrush application is running.

2: Blender — Customized controls to: RMB = rotate view, Ctrl + RMB = zoom view; activated LMB selection mode, and activated the reverse mouse zoom direction option to match ZBrush zoom direction.

3: MoI — Set Reverse zoom option in preferences, that's all. The rest of the controls match those of ZBrush when using the above custom Wacom pen button setting for ZBrush.

By doing it this way, no additional utilities are necessary if you use a Wacom pen. There's a slight lag when using the customized button for panning in ZBrush, but I can live with that.

All the best,

Metin