A memorandum of understanding will be signed during the two-day visit by Scott Morrison, Minister of Migration and Border Protection of Australia, the Cambodian Foreign Affairs Ministry said in a statement.
One was Chut Wutty, an activist who was shot to death by security guards in 2012 and the other was Chok Sopheap, a prominent activist.
Filloux spent years working with victims of the Khmer Rouge genocide in Cambodia.
Human rights in Cambodia is deteriorating and activist has urged the two main political parties to work together to reverse the trend and end culture of impunity.
A general view of daily activities of residents at Phnom Penh's White Building on Friday, September 5, 2014. (Nov Povleakhena/VOA Khmer)
A general view of Phnom Penh's White Building, known locally as the "Building" and its residents on Friday, September 5, 2014. (Nov Povleakhena/VOA Khmer)
To open more minds, Sweden has Pride parades every year, drawing tens of thousands of participants.
Cambodian human rights and democracy activists in the US have split opinions on the deal cut between the ruling party and the opposition in July, ending a political deadlock that had lasted since the July 2013 elections.
Global Witness says the Vietnam Rubber Group does not meet criteria for certification.
A senior US diplomat says the country is looking to strengthen ties with Cambodia, now that the opposition has ended a boycott of the National Assembly.
About 100 people from the remote village of Lor Pearng have come to the capital to protest a land dispute that has been ongoing for nearly 10 years.
Hun Sen appeared to be referring to remarks made Wednesday on VOA Khmer by Adhoc activist Ny Chakrya, following clashes between evictee protesters and security forces.