dbFront is a web application. This means that your clients should be able to access dbFront by simply browsing to your server. No additional installation or licensing is required.
While running locally on your server you can use the URL http://localhost/dbFront, but this URL only works when you are running directly on the hosting server.
Your local network clients would connect by browsing to your server using the URL http://**%YourServerName%**/dbFront, where the value %YourServerName% would be replaced with the name of the hosting server or workstation.
This of course assumes that there is a network connection between your server and your clients.