Can you describe the workflow you are looking for? That will help a lot in my reply...
I am guessing you mean a workflow where multple users fill out the form. FormsCentral does not support this type of workflow, which isn't to say that it cannot be used. The "Web/HTML" form is not "routable". FormsCentral does not have an approval workflow, or enable multiple users to fill out a form. You could distribute a FormsCentral form as a PDF and that PDF could be forwarded on to the appropriate users and then submitted back to FormsCentral.
A few more things to note:
Let me know if this raises additional questions.
This FAQ on FormsCentral vs Acrobat may prove useful: http://forums.adobe.com/docs/DOC-1385