Assume you have a link to [[Manhatten project manager]]
and it redirects to [[User:lgroves]]
, and the user has a real name of "Leslie Groves", then you can write {{LANDINGREALUSER:Manhatten project manager}}
and the wikicode will render as "Leslie Groves". The main effect of this is that you can write about persons refering to their roles and in the rendered text you get the actual names instead. This is most useful in wikis on intranets, where you can use the usual ITIL and PRINCE2 identifiers for roles and it will be replaced with the real names.