Could you elaborate on that a little? I have two Google accounts, both on different Apps domains, and I have no trouble using multilogin support with G+ on either.

To help debug:

1. Does multilogin support work at all for you? In other words, can you open both accounts' GMail in side-by-side tabs in the same browser? (The URL should contain something like "/a/something.com" or "/u/0" in each one.)

2. In the first of these tabs, if you click the +You link in the upper left corner, does it take you to G+?

3. Same as #2, but with the second tab

In a browsing session, the Google account you sign in to first will be the default account used by Google.

For Plus, the link for using your second session (as given in the Switch Account menu in the top right) is https://plus.google.com/?authuser=1 . You should also be able to use https://plus.google.com/u/1/ , which is the link used in the top-of-page nav menu on google.com after switching to your second session.

One temporary/hacky multiple account solution is to use multiple Chrome profiles (I think Firefox also has something similar). This way I have separate work and personal Gmails working smoothly, and using different themes for the profiles also means that I don't mistake the windows and send out something from the wrong email account.

I don't think this is a hacky solution so much as a great solution. Chrome profiles are a very convenient feature because they can add multi-login support to anything, not just Google sites.

I have exactly the same problem. My half-baked solution is to use my Google+ account in my secondary browser (e.g. Safari) and use the Google Apps accounts in the other one. It's not perfect and it's frankly the reason why I don't check into G+ that often.

Or use chrome profiles, they are working well for me.