The app I have in mind can be best compared to an alumni list for your high school or whatever. I'd embed the app in my web site and welcome people to create their own personal profile/recird with a standard form:  years attended, current location and occupation, etc.  But, I'd also like these people to have the option of going back and changing their own record ONLY, if their information changes.

So this is a public database, but with selective editing privileges. Is that possible within the Zoho Creator framework?  

I suppose I'd also need to integrate a registration and sign-in to link the person with his/her record to do this editing. Again, is that possible within Creator?

I'm not looking for all the specifics... just thoughts on feasibility and perhaps loose guidelines to get me going in the right direction.

Ideally, if someone has done something similar, I'd love to see the implementation.

...Charles