First of all it is very hard to get approved Adsense account. Adsense looks several things before approving your account. So if you have two Adsense account Approved by Adsense it means that you are not a victim of Adsense. Both are in Payee name/Address
So it is not a violation of Google Adsense. It is 100% safe to operate both the account from same ip address and even on same browser. Because it is possible that you and your father, mother, sister, brother are blogging and working from same computer.
But you should keep in mind that not both the account ads appear on same page or website together.