Bottom line is that the condo where the cooking odors originate is positively pressurized to the corridor, and the corridor in some aspect is positive to your condo. You stated that improvising some form of seal around the entry door checks the odors. This would indicate the door is the point of entry into your condo, not some other path such as cavities or voids in walls or ceilings.
Are there exhaust hoods over the cooking appliances in the condos?
ERVs can be adjusted for keeping a structure pressurized. But it could be something as simple as encouraging the owners of the the unit where the cooking odors originate to have their entry door seals checked.
Psychrometrics: the very foundation of HVAC. A comfort troubleshooter's best friend.