Hi
An active directory web service would be a simple solution such that once the authoriser is specified, then the relevant employeeID is set and has to match at the opening of the form to move over to the authorisers view.
This can be done without such a servce such that my originators specify the email address to mail the form on to the authoriser. When I open the form his email address (from AD) has to match to switch the view.
This is a good system I have use to great affect.
Adam