Offer your thoughts or opinion on the input financial query or topic using your financial background.

Additional credit card with different limit on same account?
Generally not.  Since authorized user cards are the same account and the difference between the two (the original and the AU card) are minimal. Note, there's nothing technically stopping banks from offering this as a feature, two cards do have identifiers that indicate they're separate cards, but the banks concern for your needs stops at how much they can bleed from you, and "helping you control your spending" is not part of that.