A BLANKET ban on preventing "shutting voters out" has been called for.
The Electoral Reform Society says new figures show that authorities across Wales are failing to use the internet to engage local residents.
The society also wants to see councils and authorities use available funding to open up meetings.
Only two authorities in Wales — Cardiff Council and the Brecon Beacons National Park Authority — routinely broadcast full council meetings live on the internet.
Powys County Council provides a partial service, while Monmouthshire and Torfaen are exploring plans to broadcast in the future.
The society said only four councils — Swansea, Cardiff, Monmouthshire and Torfaen — actively allowed councillors to use social networking during meetings, and some councils, including Carmarthenshire, actively ban members from using Twitter or Facebook during meetings.
Stephen Brooks, director of the Electoral Reform Society Wales, said: "Councils with a blanket ban on broadcasting business are shutting voters out and urgently need to change."