If you want to list the recipient instead of the author for your own postings and mails, set ‘gnus-ignored-from-addresses’
. If you don’t want to write the regexp yourself, use RegexpOpt:
(setq gnus-ignored-from-addresses (regexp-opt '("somename@company.com" "othername@comp.ch" "me@here.com" "metoo@here.ch" "otherme@klein.host.ac.at" "nobody@yahoo.com" "somebody@gmx.de")))