ALIAS definitions from a SQL Server installation
I think you are on a wrong track.
A SQL Server alias is a client setting, not a (global) server setting. SQL Server isn't aware, which client uses which of his local alias to connect to.
You can create an alias on a client using cliconfg.exe (SQL Client Configuration Utility).
Yes, you can use SQL Server Configuration Manager to also add an alias, but that's only for that server machine, e.g. to use for a Linked Server.