The clashes erupted on Friday, when excavators, protected by riot police, began tearing down the homes of a handful of residents.
In recent years, journalists have had to face a number of lawsuits or jail terms, especially under a criminalized defamation law.
One of the major points of concern for some NGOs was the mandatory registration process in the original draft.
City officials, including Governor Kep Chuktema, declined to comment on the families’ allegations.
Government spokesman Phay Siphan said the Cambodian government is developing each law and looking at ways to better apply them.
Many of the villagers are illiterate, and they say they depend on the communal land for their food and traditional rituals.
The law contains punishment of up to five years in prison for the illegal sale and from 15 years to life for convicted assailants.
The law has received widespread criticism from international and local communities.
The two-day training came as Cambodia approved a measure to tighten controls on Cambodian migrant laborers.
The draft law contains 85 articles meant to reform the prison system, but it does not touch on military prisons.
Some of those same NGOs have given their support to a highly public land dispute over a development project at Boeung Kak lake.
Villagers say their livelihoods there are being threatened by continuous government concessions to private rubber and other companies.