Add a few Substitution formulas:
- Substitution formulas @computername equivalent to %computername% 
 - Substitution formulas @userrole matching the user role
 - Substitution formulas @userdisplayname matching the user display name
 
Substitution formulas @timestamp matching  %timestamp% that is culture insensitive (unlike @datetime)
Last two use case is when you need to log when a user launched a process using a procedure more cleanly. 
First one would be use fully to do thing like change a background color to warn user they are in Qualification or development server.