Hello,
for my remote server setup I wanted to be able to have local (non active-directory) windows user accounts be used for authenticating clients. Since the LDAP provider cannot be used to access the local SAM database (and as such the Auth4OpenVpn plugin won't work) I wrote a plugin to do just that. It works pretty much like Auth4OpenVpn in that you can specify a local group accounts must be part of in order to pass authentication.
In case anyone finds this useful, you can find the
source code hosted at github as well as
pre-compiled binaries with detailed descriptions on how to set it up.
best regards