You can create as many as accounts you wanted to in metamask. Although it is just an interface.
My question is, suppose, if I create an ACCOUNT 1, and an ACCOUNT 2 in a single wallet, is it possible find that these two accounts are owned by one person and came from one wallet?
A while ago, when I was receiving eth from ropsten faucet(I forgot which faucet), I remember when I tried to use second account from the same wallet, it denied with the reason, an user can only accept test ETH once per day.
Are they just keeping track of IP address and barring them from taking the test ETH if they received eth in last 24 hours? Or is there a way to find out the origin?