Gmail: create filter to forward mail with modified title or content?

Gmail: create filter to forward mail with modified title or content?

I know how to create a filter to forward mails in Gmail, but i need to modified the title or content of the filtered mail(e.g. append the sender's email) and then forward it, is there any way I can do it?
I need this feature because, I have a place(program) to deal with these forwarded mails, and the original sender's email address is important to me. With current Gmail filter+forward I have no way to know the original sender's mail address when dealing with these mails.
Thanks!