Signatures linked to Alias for each users
Allow a user to create a signature for each alias they have, then when that "alias" is selected that signature can be (or is auto) selected.
Outlook has a whole section on this and it works very well, creates each signature and allows you to tell the client what to do for each account it has (alias with regards World Client).
Thank you for sharing your ideas with us. Adding signatures for each alias is now possible.