FileMaker has fields defined for each column in a table view. Determine the field name for the column and after generating the DDR, use your browser to search the report for that text. In Internet Explorer 8 on my windows XP system, I open the report, press ctrl-F to open a search box and then type or paste the name of the field into this box. The browser will scroll to and highlight the first reference to this field automatically and I can use "next" to scroll to each reference in turn.
If you field has a very generic name, you might want to change it's name in Manage | Database | Fields to something very unique before creating the report so that you can search the report without "finding" text the same as the field name but actually part of a different name.