I don't know where this is suited to be posted but there is a user named Aizawasilk on FurAffinity I have posted art by before. They are moving content made for scat and fart audiences to the name shirimeart. I don't know if this needs an alias or just updating the old posts or whatever but for future reference shirimeart is Aizawasilk but for fetish content

If the artist wants to keep the two accounts completely separate, they get two different tags.
Otherwise, one would normally be aliased to another. You can request an alias here: https://e621.net/tag_alias_request/new