Not with a HomeHub 3. It would probably need a pretty upmarket router to do so; might be cheaper to update the package!
You can put monitor software on PCs and some other devices; but that would have to be on a device by device basis.
One that should do the job is http://www.softperfect.com/products/networx/ I haven't used it so can't guarantee it will be easy to set up or even that it will do the job. Other people may well have specific recommendations.