Technical > Home Improvement > Smoke-proofing and sound-proofing from neighbours in condo

I came across a Holmes on Homes episode that had a similar situation
»www.hgtv.com/hgtv-holmes-on-home···dex.html
The episode was called Building A Wall Of Silence.
Hopefully there may be a couple of pieces of information that might be helpful.

Edit
On the list of shows, scroll to the right to find the episode.

Also, you might want to address why your place is under negative pressure and is "pulling" the smoke in. If your place was under slight positive air pressure, then the smoke would not come in (as easily).