I have two forms

• Categories - in this form, I specify which users can view a specific category (checkboxes)
• Search - this form contains two fields: a) a lookup field with a default value of 'user_id'; b) a category dropdown that filters by the lookup field (a)

I have done this in another form and it worked well.  However, in that form, each category could only be assigned to a single user.  Could the problem be that the lookup field contains multiple people?
Thanks for any help you can offer!
Chris