You can select objects or branches based on their namespaces with the Select by Namespace dialog box.

To select objects by their namespaces:

1. Select Edit > Select by namespace from the menu bar.

   The Select by Namespace dialog box appears.

   

   Select by Namespace dialog box

2. Click the namespace of the object you want to select or Ctrl-click to select multiple namespaces.
3. Click OK.

   Once the search is complete, all objects with that namespace are highlighted.

To select branches by their namespaces:

1. Select Edit > Select by namespace from the menu bar.

   The Select by Namespace dialog box appears.

2. Click a namespace or Ctrl-click to select multiple namespaces.
3. Activate Select branch.
   
4. Click OK.

   Once the search is complete, all branches (suchs as the Scene branch, Characters branch, Control Rigs branch, Constraints branch, Material branch, Poses branch, Shaders branch, Textures branch...) with that namespace are highlighted.