Introduced in Tiki20
This feature converts any wiki syntax written as
@username in all text areas to the existing actual Registered user link.
In order to mention users on Wiki pages etc. a Tiki admin needs to enable "Tagging users" preference under User Features > User Account Features on the User Settings (tiki-admin.php?page=user) control panel first.
Would produce on this site:
@luciash d' being ?