Depending on the module you need, you can (use lib) to the dir you want to use. I use it for Statistics::Lite in my own directory.
However, this only works for you if you have Perl-only modules, that don't need to be compiled and installed on the system you're using.
If you use modules like PDF::API2, your isp has to provide them.
"We all agree on the necessity of compromise. We just can't agree on when it's necessary to compromise." - Larry Wall.