Feature summary (what you would like to be able to do and where): We should add a new magic word {{CURRENTUSERNAME}} that would return the username of the currently logged in user, or the IP address if logged out.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):

The problem with the "discuss link" at WP:RM/TR is that it misrepresents the requester. To avoid this, we need a {{CURRENTUSERNAME}} magic word.

Benefits (why should this be implemented?):

It should be implemented so that the discuss link could be visible only to the original requester at WP:RM/TR.