I'm not sure what you are asking, but it all depends on what you are trying to do, and what program you are trying to pass to.
It's really easy to pass tag data in and out of links, but passing a submitted form to another program requires either a modification to the form/template, or to the back-end cgi, depending on
what you are trying to do.
For example, the postcards script has always acted like a form mailer, taking data passed from a links page, and doing something else with it, from the 2.0 version to 1.1x and now 2.0x.
All the add on .cgi programs work similarly, so the answer is "yes" but how to do it depends on your specific needs.
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