Our city 'reads meters' via an RF connection to everyone meter. They then provide the information to all customers via their municipal water web site. The data is provided in 15 minute increments.
Makes it easy to determine if a leak is present. Just look at the data during periods when no water should have been flowing.
Most water consumer accounts do not have separate meters for non-landscape irrigation versus landscape irrigation. Some do, though, and thus, yes, our city does have a means, again for some, to check if the landscape irrigation meter shows usage during wrong periods. Accuracy is difficult though, because there are other uses for water flowing through landscape irrigiation meters, besides landscaping. For example, my pool fill function come via the landscape watering meter.