Munki includes the ability to set "conditionals" for items in specific manifests to provide granular controls over the installation or appearance of items.

For example, if I have a multi-site organization, I can set a conditional on a NOPKG item that installs a printer so that the printer install NOPKG only shows up if the device user is connecting to Munki from a specific subnet. This allows me to refine the view of available self-service printers so that, for example, the printers available at Site A only show up if the user's local IP address matches the subnet at Site A. This results in me being able to pile all of my printers into a single Manifest/Assignment Group, and prevent users from seeing an overly polluted view of the printers available.

Other uses for conditionals include defining installs as only taking place on portable computers (such as a VPN client).

Please see the Munki documentation for Conditonals in Manifests at https://github.com/munki/munki/wiki/Conditional-Items for more information.