U don't. Windows Mail doesn't have identities.... and
Windows Mail puts email from all accounts into the
same Inbox. There's no setting to change that. When you send a message,
you can select which account to send from, by clicking on the From: box.
Here are a few alternatives...
1. Create folders for each email account and create message rules to move
email addressed to each account into the appropriate folder.
2. Create and use different Windows Users, each with WM accessing only
their email account.
