They said that this is the first time that posters have come up with the specific names of people who have connections with the army.
The hand written sheets of paper with lists of persons came up in Nallur, Irupalai, Kopay and Kalviankaadu.
Small crowds gathered to inspect the names that were on the posters.
A resident of Kalviankaadu said this afternoon that the names of several people in his neighbourhood had been mentioned in a poster that was pasted in his area a few days ago.
Analysts in Colombo say that the Liberation Tigers have stepped up their level of infiltration into Jaffna in recent weeks despite successful efforts by the SLA since June to clear several large pockets of LTTE activity in the peninsula.