I've been testing Zoho for an upcoming project and I seem to have two factors that are holding me back.

 

First, the application needs to allow Public users to input data, but only specific users to login and access the data.

 

Second, is it possible to create relationships between different datasets?  For example, ideally I would need to have a table of user data, and link it to survey data.

 

Are these two aspects possible?  I've been trying to read up yesterday and today but I can't seem to find these specific answers.