Yes. Are you using v11.1?
Assuming the answer is yes...
In the tree, select playing now.
Now, using the top toolbar, where you have File | Edit | View | Player | etc. etc.
click on Edit, then on Add View Scheme.
For pure simplicity, add an Artist and an Album pane in step 1.
untick 'auto name' and call it Robin
In step 4, type in: [media type]=audio
and finally, click OK
You should now see a top level node called Robin
From here, you can play around yourself to get to what works best for you.
If I've understood you correctly, I'd be tempted to set up the view scheme called "Robin" so that it shows her filtered music when selected. You would do this in step 4 by adding the rules to filter Robin's music after [media type]=audio
Then, right click on Robin, choose 'add view scheme' and set up Robins ipod viewscheme. If you place a tick in the option that goes something like "honour parent view search rules", the ipod viewscheme (which will be a sub-item of Robin) will, by default, only list music from Robin's filtered list.
Still with me?
If not, just shout. help is never far away.
-marko.