Hi Mike,
I'm not sure what John's system is, but on any NetWebForm you can add a browse control. It's a kind of "form field".
So clearly, since all form fields are on a tab, the child browse will also be on a tab.
To filter the browse, use the Filters tab. But rather than add the default filter, add a Conditional Filter. One of the conditions is "Child of Procedure" - and in this case it'd be the Child of the NetWebForm
Cheers
Bruce