Allow a user to choose between profiles?

Is it possible to allow a user to choose between multiple profiles?

My situation: I have a site that uses has different themes for different areas of the site (using sections). Right now the CKEditor shows the proper styles for the main theme, but I'd love to have it show the correct colors/etc for sub-themes as well.

I've set up two profiles ("Main" and "Sub") and pointed each one to its appropriate CSS. So far so good! But I don't know how to let the user indicate "OK now I'm working in SubTheme and I'd like to use that profile".

[Obviously it would be awesome if I could set it all up automatically so that the right one showed up in certain content types, etc. But I am also A-OK with making people select the correct profile manually with each piece of content they're creating/editing.]

Is there a way to do this? Thanks!