This was not possible in previous versions of Web TimeSheet application. In previous releases of Web TimeSheet (8.17 Initial release and below versions), if there are Drop Down User Defined Fields in the application, they would be available in the reports as the same drop down options in filters area. So at any given point of time, only one value from the drop down could be used in reports to filter out the data.

One of the new features in Web TimeSheet 8.17 Release 1 is that, the Drop down type User Defined Fields are now available in report filter for multiple selections. So in Reports, with the inclusion of such User Defined Fields as a filter, one can select (put a check mark) on one or more drop down choices in the User Defined fields filter to filter out larger set of data.