是否可以在Linq.Where()期间筛选子集合

我有一个对象继承：

DeathStar.Floors.Departments.Rooms

目前，我只选择那些有部门的楼层，这些部门的房间里有被机器人恐吓或注射的反叛渣滓：

var rebelScum = deathStar.Floors.Where(
                f=> f.Departments.Any(
                    d => d.Rooms.Any(
                        r => r.Occupant.Allegiance  == "Rebel"
                            && (r.InterrogationState == Interrogation.Intimidation
                                || r.InterrogationState == Interrogation.FloatyStabbyDroid)
                        )
                    )
                );

然而，rebelScum将与任何被审问的叛军渣滓在同一部门有空房间。

我可以在这个.Where()内过滤，只返回已占用的房间吗？

  IEnumerable<Room> roomsOccupiedByRebelScum = deathStar.Floors.SelectMany(f => f.Departments)
                                                .SelectMany(d => d.Rooms)
                                                .Where(r => r.Occupant != null && r.Occupant.Allegiance == "Rebel" && 
                                                (r.InterrogationState == Interrogation.Intimidation || r.InterrogationState == Interrogation.FloatyStabbyDroid)
                                                );