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")))