In the rich text editor:
@Vultureistic
In a comment:
[Vultureistic](https://chowlings.com/user/Vultureistic)
For Names and Avatars:
In the rich text editor:
%Vultureistic
In a comment:
[![Vultureistic's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Vultureistic) [Vultureistic](https://chowlings.com/user/Vultureistic)