Define "under"
If you mean, can you define one parent record with a relationship to many child records, yes. Look up parent/child relationships in the Help files. In this case, you have a prime key in the record that is "on top" and foreign keys in the "under" records, where the top record's prime key matches the under record's foreign key. Then a one-to-many relationship in the relationships window finishes the job. Forms will do this for you pretty much automagically if you set it up right.
If you mean something else by "under" then please be just a LITTLE more descriptive in what you want.