If PerWorldInventory is installed then both commands can take an optional extra argument:
- /invsee <userName>|<uniqueId> PWI{<property>=<value>,...}
- /endersee <userName>|<uniqueId> PWI{<property>=<value>,...}
...where <property> can be one of [group, world, gamemode].
Because PerWorldInventory shares inventories based on groups you can specify the group directly as a property, or you can have InvSee++ resolve it for you by just specifying the world. If a gamemode is unspecified then InvSee++ will default to gamemode survival.