Many to Many Data Grouping & reporting

I've realised a limitation to 'NowThen', my current time-tracking app.

I want to see data about **the total amount of time** I have spent on a particular **day/week/month**
- Performing Quality Assurance tasks
- Working for the EMF project
(so that I can bill accurately and know how I spend my time for each project/week/month)

What NowThen gives me is tasks categorised as follows:
- Project A - QA
- Project B - QA
- EMF - QA
- Project A - Front-end Coding
- EMF - Front-end Coding
- Project A - UI Design

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I want a system that is able to match **My Tasks** with **My Projects** so one recording is simultaneously 3 pieces of data:
- Time working on This task of this description
- Time working This project
- Time performing This task for This project