That's not true. In order to determine the version of a module, Perl must first load it. As such, Perl can't load anything but the first module of a given name it find, even if a version if specified.

$ cat Foo/Mod.pm
package Mod;
$VERSION = 1;
1;

$ cat Bar/Mod.pm
package Mod;
$VERSION = 2;
1;

$ perl -e'use lib qw( Foo Bar ); use Mod 2;'
Mod version 2 required--this is only version 1 at -e line 1.
BEGIN failed--compilation aborted at -e line 1.
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