You should have a Subversion repo to which you can successfully login and browse anywhere using a recent vintage of the popular TortoiseSVN on Windows.
The last step is to tighten Apache access a bit. This is where LDAP really shines.
<RequireAll> Require valid-user Require ldap-attribute memberOf=cn=subversion_users,cn=groups,cn=accounts,dc=mydomain,dc=la <RequireAny> Require ip 126.96.36.199/32 Require ip 192.168.111.0/24 </RequireAny> </RequireAll>
The LDAP stuff might be new for some, so that should get you started.
The Subversion documentation warns about using path-based authorization, but then provides instructions how to do it. Ideally, Apache’s LDAP auth should be enough.