Re: Can Tracker display only the records added by the user that's logged in?
Hi Joan and welcome to Tikiwiki community! 
(and maybe to the Catalan section of tiki users? ;-)
Yes, you can do that with trackers viewed through the trackerlist plugin using the param view=user
I have that set up and working with my students to provide them with a tracker-based gradebook, and it works well.
See through http://doc.tikiwiki.org/Trackers
HTH
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