I'm aware that navigation items are setup to show and hide base upon whether the logged in user has permission to the site/page/Etc. This is great, but what about heading folders? For these I've used audiences, but wish there was a better way as audiences only compile once a week.
For example: the site I'm working on has 3 bulletin boards. One BB is for people who have an office in the corporate office building. The other 2 are for folks that work off-site and based upon being in management or not. The 2 get a Navigation folder. How do I use permissions instead of audiences to control the display of the folder?