Will you make these assignments manually?

You probably will have to create a custom module to handle the personalized redirection.

I think that you will have to have a list of users, and the sites to which they are redirected. Then, you will need to create a module that redirects a user to his target page. Put that module on the page to which all users will be redirected after login.

Thanks for the response, I appreciate it.  I had no idea this would be more complicated.  I dont even know how to make a custom module.   One would think that having child portals, this function in a module woulnt have been thought of as part of the process.

Complication often comes about when the question/requirement isn't clear. If you could explain what you are trying to do, and why, with a few more details, then a simpler answer/solution might appear.

The main thing here is ... how does the system determine to which site User_A is to be redirected?

Sure, sorry for not being clear.  Lets assume that the User is created under the Parent portal www.mainsite.com

The admin sees a new user is created but has not given the user any security roles yet.  The admin sees that this is a new client of his so, the admin creates a child portal called CHILD1 for this USER under www.mainsite.com/Child1

The admin creates a new SECURITY ROLE called "Child1 Client" for this new USER.   Admin gives new USER the security role "Child1 Client" and the new user has access to all webpages under www.mainsite.com/Child1.

New USER gets an e-mail that account has been approved.  New USER logs into the parent portal at www.mainsite.com.

What I would like the log in system to do is recognize the new USER belongs to the security role "CHILD1 Client" and redirects to a default page in www.mainsite.com/Child1/Default.aspx.

Hope this helps.  Thanks again.

What you have described is not part of the "out of the box" DotNetNuke system.  But ... it wouldn't be too hard to implement.  I believe that there are some systems that permit "single sign-on" to portals in a site.

When the admin creates the new roles, etc., an entry in the new user's profile (inaccessible to the user) could also be created that identifies the portal to which the user should be redirected. You would need a simple module to do the redirection.  If you put the identity of the child portal into a profile property, I believe that you could do this with a tiny bit javascript or jquery code.  This would be placed on the "redirect after login" page.  It might not require any module creation at all.

(I'll look into this ...)

Joseph,
That would be great.  Ill look forward to your follow-up.

Thanks.

I would suggest you look into the Dynamic Login module from DataSprings:

http://datasprings.com/Products/DNN...fault.aspx

They have a 20-day fully functional trial version.

That's also a good idea.  (Unfortunately my time to "follow up" on the my other suggestions has been quite limited.)