Recently I was writing a small comment-delete PR to omnicron and was surprised when I saw the commits were unverified with a generated profile picture.

Turns out I was commenting on the PR using my personal account but writing the commits with my work account.

Per Domain

[user]
    name = Gregory Ganley
    email = greg@ganley.dev
    signingkey = PERSONAL_KEY_ID

[commit]
    gpgsign = true

[includeIf "hasconfig:remote.*.url:*gitlab.com*"]
    path = ~/.config/git/config-gitlab-work

[user]
    name = Gregory Ganley
    email = gregory.ganley@company.com
    signingkey = WORK_KEY_ID

Per Repo

[user]
    name = Gregory Ganley
    email = greg@ganley.dev
    signingkey = PERSONAL_KEY_ID
[includeIf "gitdir:~/Developer/work"]
    path = ~/.config/git/config-work

[user]
    name = Gregory Ganley
    email = gregory.ganley@company.com
    signingkey = WORK_KEY_ID