When sending out an email based on a workflow action, it is useful to be able to append the workflow initiator on the email. However there is no method available to find out who launched the workflow.
The best I can do is capture who last modified the content. However this is not accurate for two reasons:
A) they may not be the last person to edit but did launch the workflow.
B) a developer may edit the template and then they are chosen as the last editor. (awkward and makes it look like the dev was editing the content)