I connect to my metered internet connection through dialup. Windows 8 (and 8.1) has special support for metered connections in order to track and reduce data usage, but the option seems to be missing for this class of connectivity.

Or is it? Is there any way to set this kind of connections as metered?
As reported here, only Wi-Fi connection could be set as metered. But, I think, there can't be a big difference between Wi-Fi and dial-up connection in terms of metering.