Official comment
You can use shortcodes to show or hide content based on membership level, tags, or if the contact is identified. The shortcodes for membership are:
[show_if has_one="Many,levels"] content [/show_if]Displays content only for members who are logged in and have ANY of the membership levels listed (separated by commas).
[show_if has_all="Many,levels"] content [/show_if] Displays content only for members who are logged in and have ALL of the membership levels listed.
[show_if not_one="Many,levels"] content [/show_if] Displays content for members who are logged in and are missing ALL the memberships listed.
[show_if not_any="Many,levels"] content [/show_if]
Displays content for members who are logged in and are missing any of the memberships listed.
For tags, it is:
[show_if has_tag="Tag"] content [/show_if] This displays content only for members who are logged in and have the tag indicated by "Tag"
And last, use the following to show/hide based on if a contact is identified:
[show_if is_contact] content [/show_if]
Displays content if visitor is an identified contact in your database
[show_if not_contact] content [/show_if]
Displays content if visitor is not an identified contact in your database