Players who have an accrued season of NFL experience (6 or more games on the active roster) are not eligible for the PS. However, players who have fewer than 9 active games in their only accrued season are still eligible.
Naaman was active for 6 games last year, giving him an accrued season. Because all of those games happened in the same season (2010), and his active games were fewer than 9, he would still be eligible for the PS this year.
If he is active for one more game, he would no longer be eligible for the PS with any team. Players can be on a PS no more than 3 seasons.