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• work servers, $work maintains system packages for perl and modules, including cpan/cpanm/etc
• work desktop, macports installs multiple versions of perl and a separate cpan/cpanm executables for each. I can run a specific version as, say, perl5.34 or I can select which version is just 'perl' using macports's tools.
• home, I use a portable installation using either perlbrew or Strawberry Perl, or I build from source in, say, /opt/perl5.36 or /home/mischief/perl/5.28 or so and install the modules in each version's own directories