I've created a demo program that creates a stage, adds group and a text-button and then attempts to render a tiled map inside the group box using its own camera. You can pan as well as zoom the map but its definitely not working as intended.
If someone with more LibGDX knowledge than I posses (which, granted, isn't very much) can look at it and tell me where I went wrong, or how to modify it to constrain the rendered map to just the group box I would be very grateful.
Thanks in advance,
Richard