I think that it's not possible(and i hope it's not possible) because the requestor should be the logged userinto the browser session. Maybe if you explain the scenario we could help you. For example, if you want a user to submit request on behalf of another user, it's possible in the form setting('Changes apply to') to specify who is the change affected user. So the requestor is the user logged into via but the changes will be applied to one(or more) user that will be chosen before the form is run.
Hope this helps
ps
via Web Services it could be possible with the <onbehalfof> tag.
I think that it's not possible(and i hope it's not possible) because the requestor should be the logged user into the browser session. Maybe if you explain the scenario we could help you. For example, if you want a user to submit request on behalf of another user, it's possible in the form setting('Changes apply to') to specify who is the change affected user. So the requestor is the user logged into via but the changes will be applied to one(or more) user that will be chosen before the form is run.
Hope this helps
ps
via Web Services it could be possible with the <onbehalfof> tag.
Marco Sannino
Moviri SpA
Milan, Italy