Is there a way to filter out Potentials that do not have tasks

Is there a way to filter out Potentials that do not have tasks

I.E. - every potential account (and lead in my use of Zoho) should have an activity assigned to it.  I would like to view all potentials/leads that do not have an activity assigned to the account.

Make sense?  Right now I have to enter into each potential/lead to find out if an activity is scheduled.