I understand what you're looking for, but unfortunately, JFBConnect does not have granular permissions like that available for Channels and posting content.
When you setup a channel within JFBConnect, that becomes available to all admin users to post to. You can change the user group that is able to post by using the 'Options' button from the JFBConnect admin home page, but even then, it would apply to any users in that group or above.
There isn't a way to say users in group 'a' can post to channels y and z while user's in group 'b' can post to v and x and user's in group 'c' can post to v, x, y and z.
As for the image you posted about not being able to connect, when I click the Facebook login button, the popup shows the following error message:
JSSDK Option is Not Toggled
Please toggle the "Login with Javascript SDK" Option to Yes in developers.facebook.com to use the JSSDK for Login.
Can you go into your Facebook Application settings and make sure that setting is enabled.
If you haven't already, please follow our full
Facebook Application Setup Guide
.
Finally, please do not post your admin account details here. This is a public forum. If you need to send private information, use the Contact Us link at the top of the page. We'll usually reach out to you and let you know if we need admin credentials to diagnose an issue.
Thanks,
Alex