Bukkit

Hello,Is there anyway to set a zone or chunk of the world where clear lagg doesn't scan or is this a planned feature . I have a plugin (tardis shop) that makes blocks into shops( you right click the block and that's how you buy the item). To show what item is for sale it has a floating whatever item is for sale above it, ClearLagg sees this as a ground item and deletes it. I know I could just filter those items to not be picked up but I don't want them not picked up when purposely left on ground.