Help me with my project

Hi,
I’m planning to create a single blog with many members (shared blog). Each member can create a post with pictures in it.
How can I:

Manage pictures based on each user? So I like to have this folder in my wordpress.

/upload/nameofusers/year/month/date/namesofpictures

Each user can only see their own pictures.

What plugins that I can use, specially to manage multiple users?