This plugin should use this http://samy.pl/evercookie/ or similar techniques to mark every visitor (workstation) in unique way. Moreover, it should log every account activity under different 'user'. In the end it should produce such logs:
user id 1, id string is DEF3723782FE812D090AB98C77
Registered accounts: account1, account2
Logged into accounts: account1, account 3
Posted (voted etc, any activity): account2
Basing on this information i want to have a set of rules, like 'disable registering more than X accounts', 'prevent user from posting from more than X account', 'disable using more than X accounts' with customized messages in each case.
I expect this module should cost around 30-50$, correct me if i am wrong, if anyone will make it for me, i will post it in free access (or author can make it open source).
For any clarifications and more detailed technical task feel free to post here or PM me.