In the 1950s, it was perfectly acceptable to powder ones nose at the table, whereas today it is considered inappropriate. Excuse yourself to the restroom for a quick powder touch up.

Regarding lipstick, if you are with friends, it is fine to quickly and discreetly apply lipstick after the meal (though no lip liner, and without using a mirror).
If you are at a business meal, applying lipstick and other makeup touch ups are best done in the restroom. You want to be remembered for your business savvy, not your makeup application savvy.