如何使用powershell以编程方式查找用户HKEY_USERS注册表项？

I wonder if there is a way to find a local user's registry key in HKEY_USERS if you know the login-name of that user on the local machine. I want to programatically add stuff to a specific user's registry keys (Autorun for example), but I only know the username. How can I determine which of the cryptic users in HKEY_USERS actually belongs to a specific username?I wonder if there is a way to find a local user