Some of the mission giver guests in My Interior can be picked up, carried, and placed elsewhere (e.g. when trying to get a clean screen shot), however the Creation Host cannot. As an alternative, he can be "herded" into another area by attacking him to push him away, and then trapped using one or more Floor Decorations such as Belle's Large Bookshelf.
If the Darkwing Duck and Scrooge McDuck guests are relocated to another room and trapped, they will periodically respawn in the Lobby. This can be avoided by trapping them in the side hall below the Lobby Stairs.
The Creation Host may eventually respawn in the Lobby, even if he had been trapped in the side hall.