Package filtering in Repology is very flexible, so you can combine all kinds of conditions. But here are some preset queries to start with:
This maintainer is active in the following repositories:
There are 7 known problems for packages maintained by dcollins@cpan
There are 16 total package(s) for 8 distinct project(s) known.
perl:ai-ann, perl:dcollins-ann-locals, perl:mediawiki-bot-plugin-cup, perl:mediawiki-bot-plugin-imagetester, perl:mediawiki-bot-plugin-se, perl:perlwikipedia, perl:perlwikipedia-plugin-imagetester, perl:rest-buildbot