This can be accomplished using a third party plugin, such as Display Posts Shortcode.
You’ll need to be running 1.1.23 or later of Directories Pro.
Go into Directories –> [Your Directory] –> Content Types –> Listing –> Manage Displays.
Add a text display element with [display-posts author=”%author_name%”]
This is not currently possible but is planned for a future release.
There is no such functionality built into Directory Plus. However, Sabai recommends the Post Category Filter which provides this functionality on the backend (WP-Admin).
Unfortunately, this does not help with the front end user submissions.
Most plugins, especially if they have shortcodes, can be used with Directories Pro. When using shortcodes, place them into a Text Display Element.
Not built in, perhaps through a third party plugin.
No, but if you disable the custom login feature provided with Directories Pro you can use a third party social plugin.