To View the Other User Lists to Which a User List Belongs

Open the User / Group Management dialog.
Do one of the following:

Expand the All User Lists node and select one of the user lists listed under it.

or
Expand the Folder and Projects node, select a folder or project to which a user list is assigned, then select the user list.
Set Display Type to Member Of.
The other user lists to which the user list belongs display in the Assigned list (right).