Omkar,
I think I understand your requirement. You can use Xpath functions to accomplish this. As a test, I created a Listview with the Xpath constraint below. This shows all demousers for whom the Current Time is between their StartTime and FinishTime.
[hours-from-dateTime(StartTime) <= hours-from-dateTime('[%CurrentDateTime%]')
and
minutes-from-dateTime(StartTime) <= minutes-from-dateTime('[%CurrentDateTime%]')
and
hours-from-dateTime(FinishTime >= hours-from-dateTime('[%CurrentDateTime%]')
and
minutes-from-dateTime(FinishTime) >= minutes-from-dateTime('[%CurrentDateTime%]')]
I am not sure if this is exactly your use case, but if not, perhaps this example will give you a starting point.
Hope that helps,
Mike