Is there a way to secure a form based on what is on the detail lines?

Here's the problem:

When loading the form, you don't really know how many detail lines you have, take AP90 or PO30 as examples.

If I wanted to restrict access to AP90 based on whether or not the user should have access to a distrinution accounting unit then I would be in some trouble cause each line could be distributed based on a different acct-unit.

This is exactly why we need the js file I mentioned in my other post. But if you guys have figure it out please let me know

T