You can filter the views on the 
               Activities page based on column values. You can specify filter strings to be applied to: 
               
            
 
            
             
               
               -  Text-based data fields. 
                  
               
- Calendar filters (using 
                  Before, 
                  After or 
                  On operators) for date-based fields. 
                  
               
- Numerical operators (>, 
                  <, and 
                  =) for number-based fields.