Usually, yes. We allow our users to create as many accounts as they wish on MintDice so long as they are all for what can be reasonably defined as legitimate purposes. However, we would not tolerate multiple account creations for many reasons which may include but are not limited to:
Faucet Abuse
Promotional Abuse
Cheating, collusion or other advantage playing in any of MintDice's Skill Games
Money Laundering / Obfuscation
If you simply wish to create new accounts to have new, fresh usernames, a fresh account to gamble on or anything of that nature (even for skill gaming), then feel free to create as many accounts as you would like to on MintDice.