Apache Proxy to limit dashboards

Hello together,

i try to limiting the access to chosen dashboards. Is that possible?
The idea behind it is that employees only have the insight on a dashboard with anonymous access and not on multiple dashboards.
Structure:
Client => Apache Proxy (other linux client) => Grafana-Server
Client access for example http://192.168.178.50/grafana and get the this URL from the grafana-server:
'http://192.168.178.10/grafana/d/xxxxxxx/metrics?’

Configuration:
Apache Proxy:

ErrorLog “logs/authproxy-error_log”
CustomLog “logs/authproxy-access_log” common
RewriteEngine on
RewriteRule ^/?$ /grafana/ [R=permanent,L]
<Location “/grafana”>
ProxyPass http:///192.168.178.10:3000/grafana/d/xxxxxxx/metrics
</"Location>
ProxyPassReverse /grafana http:///192.168.178.10:3000/grafana/d/xxxxxxx/metrics

Grafan.ini:

[server]
protocol = http
http_port = 3000
domain = 192.168.178.10
root_url = %(protocol)s://%(domain)s:%(http_port)s/grafana/

But it shows me only the proxy failure side from grafana-server.
Has anyone ever tried the same?

Thanks!