This can be done.
You can define fields of type time and type date for clocking in and out of a project. Define one table where one record = 1 instance of clocking in and out. Define other tables that let you work with groups of such records and and compute totals. You can even set up the layout so that clicking the field or a button clocks you in and out.
In another table, for example, one record = 1 Project and you then set up a project ID field to relate to your table of "time slice" records.
That should be enough to get you started.