I don`t suppose you care to define carefull?
That is not an easy question to answer.
You know, it is easy to overlook the fine details once you get too reliant on this powerful proxy tool. It's like driving a high-performance powerful Ferrari sport car - easy to go to 200MPH, but think of cops out there who are watching you. Same idea here.
What I'm saying is that..if you have private proxies from private providers here (or mine), you need to treat them with care.
This proxy tool, come with editable http(s)/socks list, will allow you to track of which site/account you use by relying on the proxy # labels (#1 - #100). If you want something better, you can edit the http(s)/socks list with this format:
123.123.123.123

ort,US,Site Name1
123.123.123.123

ort,US,Site Name2
123.123.123.123

ort,US,Site Name3
123.123.123.123

ort,US,Site Name4
etc.
etc.
or
123.123.123.123

ort,CA,Site Name1,AccountName1
123.123.123.123

ort,EU,Site Name2,AccountName2
123.123.123.123

ort,ES,Site Name3,AccountName3
123.123.123.123

ort,UK,Site Name4,AccountName4
123.123.123.123

ort,RU,Site Name5,AccountName5
etc.
etc.
Formats:
IP : Port, County Code (2 letters), State/Province, City
IP : Port, County Code (2 letters), WebSite, AccountName
etc.
etc.
Hope it helps.