I have heard this said: but... have yet to see proof.
Myself and several of my clients are smokers (NO, there is no smoking in my house at all EVER, so not at my table neither) and we don't have lift..
But I use UV Gel, maybe this only applies to L&P as its more porous?
It's only if there is anyone smoking at the time of you doing nails (L&P or Gel). It's fine if they smoke after curing.