sendtoaddress is using the "" account by default. Is it possible to make it use any other account name?
sendtoaddress Doesn't support accounts at all
Parameter #1—to address Parameter #2—amount to spend Parameter #3—a comment Parameter #4—a comment about who the payment was sent to Result—a TXID of the sent transaction
What you can do as alternative is
getaccountaddress to get bitcoin address of an account and then
Accounts are deprecated and
labels are the alternative for
I'd recommend using latest Bitcoin 0.17.0 which has multi wallet features which can isolate each user, further read: