Multiple SSH keys and Github users

Git is a great tool. I've been using SVN and Mercurial but for me Git hit the spot. There are times I'm sitting comfortable in chair git pulling or git pushing feeling the flow and everything is working as expected. But sometimes I want to change git account to another - private one and there is the hitch.

Option 1

I can set global config for my private account

git config --global user.name "Your Name Here"
git config --global user.email your@email.com

And I can specify individual user.name and user.email to use in specific repo.

git config user.name "Your Name Here"
git config user.email your@email.com

It works over https but what about ssh? I want to use my keys for the auth process.

Option 2

In this option I assume that we have two ssh keys created and ready to use. If not, follow this step-by-step guide at help.github.com

Back to the topic. I can make ssh config to handle it for me. First of all I need to create or edit ~/.ssh/config and configure two or more hosts in there.

# Personal Github
Host github-cringedcoder
HostName github.com
User cringedcoder
IdentityFile ~/.ssh/id_rsa_cringedcoder

# Work
Host github.com
HostName github.com
User git
IdentityFile ~/.ssh/id_rsa

Later if I want to write code as cringedcoder I have to provide address with changed hostname.

git clone git@github-cringedcoder:cringedcoder/cringedcoder.github.io.git

Also if I already have cloned repo and I want to change account without cloning it again, I change url in [remote "origin"] section in .git/config file of the repo, or simply

git remote set-url origin git@github-cringedcoder:cringedcoder/cringedcoder.github.io.git

And then I have to change user for this specific repo in case of commit user mismatch.

git config user.name "Cringed Coder"
git config user.email "[ommited]"