If you know the url of the .PPD file for the module you wish to install, then you can completely bypass the search:

PPM> install http://www.bribes.org/perl/ppm/SomePackage.ppd

Google's usually much quicker to find them than the built-in search.

Alternatively, if you know which repository has the module you want, you can disable the others before doing the search:

ppm> repo list
┌────┬───────┬────────────────────────────────┐
│ id │ pkgs  │ name                           │
├────┼───────┼────────────────────────────────┤
│  1 │ 12055 │ ActiveState Package Repository │
│  2 │   n/a │ www.Bribes.org                 │
│  3 │     0 │ cpan.uwinnipeg.ca              │
└────┴───────┴────────────────────────────────┘
 (2 enabled repositories)
ppm> repo off 3
ppm> repo list
┌────┬───────┬────────────────────────────────┐
│ id │ pkgs  │ name                           │
├────┼───────┼────────────────────────────────┤
│  1 │ 12055 │ ActiveState Package Repository │
│  2 │   n/a │ www.Bribes.org                 │
│  3 │   n/a │ cpan.uwinnipeg.ca              │
└────┴───────┴────────────────────────────────┘
 (1 enabled repository)
ppm>

At this point, a search would only download the packlist for the AS repo.