Raspberry pi pirate box additional features?

i made a pirate box using raspberry pi 2 and i want to know if i can make more things on it like :
1.security on it (password)
2.know who is connecting to it and block some ip addresses
3.change the layout

anyone can help me to do this or give me ideas please?
thanks

YES YOU CAN!
It will take a little research but the TRUTH I OUT THERE!

1. security on it (password)
Check out the /opt/piratebox/conf/hostapd.conf for config info. (not the only place it needs set though. I believe you also need to change it in /etc as well.

2.know who is connecting to it and block some ip addresses
Logging is much harder as many measures have been taken to REMOVE logging. I'd look into the Library Box project as it has logging already. You cannot block the IPs as they are set with DHCP and are random. You CAN however in the newer versions do MAC filtering (MAC addresses are device specific identifiers)

3.change the layout
/opt/piratebox/www is where the webfiles are. Go HOG Wild! :-)

Hope this helps. If you are unsure of what you are doin, Check out fiver and maybe you can find someone who does linux who will give you some face to face instruction/help for a few bucks.