I don't think so. Have in mind that I might be wrong, but only a newly registered player takes a non-eu spot, no matter if you own him or not.
Shevchenko was loaned to Milan, but he took a non-EU spot.
I believe that Caceres took a non-eu spot this year and since he was already registered for Juve in 2009/10, he won't be taking a non-eu spot in 2010/2011.
I repeat that I might be wrong. Although I think that i'm not