You should expose the ports which your service inside container is listening on to the host.
For example if you are running apache httpd inside container on port 80 and other people in the same network want to access it you should do the following.
docker run -d -p 80:80 apache
In the example we are mapping port 80 of container to host port 80. So now others on your network can access port 80 of your host to hit port 80 of container.