I followed this a few years ago, not really thinking about ssh keys and logins.

I still see all the replies here and each time I think, but it’s not possible.

To everyone wishing this; see an ssh key as a unique combination of username and password. Attaching a single ssh key to multiple logins would be to have multiple logins with the exact same credentials. So which account is it? It’s just not possible!

Github doesn’t support it either, they do support multiple email adresses per login and separating commits based on that, but not the same ssh key on multiple accounts.

I'm here about 4 1/2 years since originally posting to say this is one of the main reasons I'm leaving Atlassian products. 

Why is this Wont fix?  Is it so ridiculous to think people might use bitbucket for work projects and personal projects on the same machine and don’t want to do all kinds of key shenanigans to make it work?

It seems Atlassian employees are not Atlassian users, otherwise this issue wouldn't be WONTFIX.

Yes, this should be resolved asap.

I also faced the same issue. It needs to be fixed asap

This seems like a high priority issue to resolve. Very frustrating. 

Again this problem... Cannot understand why it's still unresolved...

There's a small mistake in the directions linked to above that might trip up a new user (https://blog.developer.atlassian.com/different-ssh-keys-multiple-bitbucket-accounts/). On the line that reads `

ssh-add -K ~/.ssh/user1.rsa

It should be

ssh-add -K ~/.ssh/user1{{}}

Just here to say +1, multiple accounts for different projects (work, private, side-project) on the same machine. Cannot understand why this is not supported \: