I have run into this issue before.
Try this approach:
Make a helper table called Current User Record ID.
Create One record.
It will be Record ID# =1.
Make a formula numeric field on the user table called [Link to Current User Record ID#]. The formula will be 1.
Make a Summary Maximum of the Record ID# of the User's table where the filter is that the userid is the current user.
OK, Great now that magic record has the Record ID# of the current user and you can look that up down to any table by making a relationship using a formula of 1 on the "child" table and then use a from rule to populate Related User.
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Mark Shnier (Your Quickbase Coach)
mark.shnier@gmail.com
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