As far as I can see, the is no mechanism by using an UCS-style configuration (like UCRV) for this.
As an example: the templates inherit a hardcoded
VirtualHost *: statement which is causing Apache to listen on all configured interfaces. One would have to edit templates and/or directly touch config-file owned by packages.
Restricting access to UMC by using .htaccess as discussed several times in this forum is still possible.