[Gammix]

You can easily perform this by using streamer memory natives.

pawn Код:

for (new i, j = Streamer_GetUpperBound(STREAMER_TYPE_OBJECT); i < j; i++) {//loop through all dynamic objects
    if (IsValidDynamicObject(i) && Streamer_GetIntData(STREAMER_TYPE_OBJECT, i, E_STREAMER_WORLD_ID) == 10) {//check for virtual world 10
        DestroyDynamicObject(i);//destroy the object in world id 10
    }
}

EDIT: Use a validity check to avoid that warning.