Generate Unique address for each users? I have PHP Based Web Bitcoin Wallet on localhost. I use simple Login system and basic bitcoin Json-RPC. 
In fact, everything is runing clearly, but my Bitcoin daemon giving same Bitcoin address to all users.

I want, Unique bitcoin address for every user? How?
The JSON-RPC has a method called getnewaddress that will generate a new private-/public-keypair and return it to the caller. You can use this to generate a new address for each user. In order to track the balances of users I'd suggest grouping a user's addresses in an account associated with the user by calling getaccountaddress with the user ID or the username. You can then use the getbalance &lt;user&gt; call to check its current balance. However, there are some caveats when grouping addresses with accounts.