You might want to clarify just what a "Cause Mapping Tool" is and how
it might be related to things Excel.
Very general questions like your aren't likely to get many meaningful
answers. If you can break the task down into small pieces with very
specific requirements, you'll almost certainly get an answer you can
use.
Cordially,
Chip Pearson
Microsoft Most Valuable Professional
Excel Product Group, 1998 - 2009
Pearson Software Consulting, LLC www.cpearson.com
(email on web site)