Apart from both the responses above you can also take a look at this thread : Multi-account penalty.
where you can notice some of them given penalty if they are using their duplicate accounts, this is not bitcointalk where multi accounts is allowed but here you can have only one account unless you reached hero member then you're allowed to have two more accounts and it should be declared as well to avid any penalty.
As discussed in this topic : https://www.altcoinstalks.com/index.php?topic=319400.0
Every user that reaches hero rank can have 2 additional accounts that should be declared as duplicates.
Thus a total of 3 accounts that can join bounty and signature campaigns.
The bounty managers have no problem accepting the duplicates accounts if content quality is good.
So, does the admin really allow multiple accounts after becoming a hero member? Well, I think I should create two more accounts now, haha. But if I can't find the time to manage one, how will I be able to handle two more? Speaking of accounts, I actually have two already—one on BTT and one here on ALTT—and I sometimes find it difficult to post on both.
If I created two more accounts and declared them, how would other people see me? I guess I have to find out. But first, I want to know if I'll be given a tag that shows everyone I have two additional accounts. Once that tag is on my profile, how will other members trust me, or how will they perceive me?
I know signature managers have allowed alternate accounts, but let me tell you this first, Recently, Royse removed some members from the campaign for abusing it with multiple accounts and being connected. This wouldn’t have happened to them if they had just declared it beforehand. I guess they might not have been aware of this information, as I only just found out about it myself.
Why would they not declared it before? Maybe they thought mangers wouldn't accept him/her, or what?