Can I Achieve This

[rudraansh]

Currently I have two WANs with Load Balancing and Failover

I would like to achieve the following

For the whole month what was the total downtime of both the WANs.(individually)

I want to restrict uploads and downloads depending on the particular user.

I used  squid and URL filter but every time i configure it browsing stops at my LAN and it should work in a MultiWAN setup.
How Much of total downloads have been done by me using both the WANs.

A live graph of a LAN Side to know which IP is using how much of my Bandwidth.

a complete tutorial is required.

[GruensFroeschli]

Downtime can be seen with the quality graph under "RRD graphs).
If you want it more specifically you will need to set up a network monitoring solution (like nagios) on a different system

UP/DOWN restriction depending on user should afaik be possible with some hacking with FreeRADIUS and the Captive Portal.
Not sure what the status is. Read more in the Captive Portal / packages subforum.

squid is not multiWAN capable.

Look at the available packages if you want to monitor who's using how much bandwidth.

…. I find it quite daring for you to request a "complete tutorial".
Write one yourself....