Using the combination of the Project Plan agenda and the new planned task "Add missing project to attendance records" individual people can preset their "Default Project".
If the person puts in an entry in which they selected a project, everything will remain as before. However, if he enters an entry for which he does not select a project, his "Default project" will be added, or the project that is planned for that day in the Project Plan. You can find more about projects in the online help here.