Any ideas how I would hide or show a dialog tab panel depending on which user group the user belongs to?
I tried to do this through the CRX content explorers (ACL's). But I'm not getting much luck with it.
Cheers
As noted by anthonyh, the ACL approach is the way to go (if such a behavior is really necessary).
For example, to hide the "image" tab of the base page component:
/libs/foundation/components/page/dialog/items/tabs/items/image
deny jcr:read
for author
Note that in case of tabs included with xtype=cqinclude
you have to set it on the include itself, not the included definition. Because at runtime it would complain over the missing target of the include and not render the dialog at all.