Does this (http://drupal.org/node/86498) help any?
Vasileios Lourdas wrote:
Hello,
I've been using webform for an advanced contact form node in a Drupal 5 site I administer. There is a new requirement, that involves personal data collection from several users. Using webform, is it possible to create master/detail forms? For example, I want to have a some kind of work experience fieldset, that accepts variable number of submissions, regarding one's work experience (eg. position and title of a work, year from, year end for the speficic positiom, etc. -I guess you get my point-).
I suppose that, based on my current knowledge of webform, this is not possible in a direct way (eg. from the UI). Am I wrong?