Ownership of files installed by an rpm

["Andrea Sciaba'" <Andrea Sciaba cern ch>]

Hi,
is there a way to make all the files installed by an rpm to be owned by 
the user installing the rpm itself? Of course, I am interested in the 
case where such user is not root.

The only mechanism to decide the ownership I am aware of is the %attrib 
macro, but as far as I know, the userid must be hard-coded in the spec 
file, and this is not useful to me.

Thanks,
Andrea Sciaba'