Do you want to know how to open Local users and Groups console from Run window? In this console, administrators can perform oprerations related to user accounts and local groups like creation/deletion of accounts, resetting password, changing group membership etc.
Execute the command
lusrmgr.msc to open user accounts window from Run.
Windows 7: lusrmgr.msc
However, on Windows XP we need to run a different command.
On XP: nusrmgr.cpl
Also, we can use Netplwiz from Run window to launch user accounts window which shows only the local user accounts on the system.
If you are looking for a way to manage user accounts from command line then see the below posts.