Last I recall this could only be done in Joomla 1.0 as Joomla 1.5.x patched being able to do this as was a vulnerability. I do not know how one would do this through Joomla 1.6.x but would suspect is the same scenario in not offering linked author names. At any rate of possible would require a new Joomla content plugin to alter the articles contents changing the author.