Hi,lasoma

Try out the steps given below.

1.Click on Controls and drag the Repeating table.
2.Right Click on Repeating table and Go to Repeating table Properties.
3.Then click on Display Tab and click on Conditional Format.
4.Click on Add Button and select some field Name (field1)
5.Select ‘is not equal to’ in second Drop Down and Field Name (Field2) in
third Dropdown.
6.Then check the check box “Don’t allow user to use this control to insert
and delete this control.”
7.Click ok.

Hope this Helps you.
Thank u.