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