They review applications beforehand to assess the "relevance of the research proposal" and check if it fits "the objectives and research priorities for this program".
There is no statement whatsoever that the data provided will not be used for training (so there would not be an "lying" required), but I'm happy to be proven wrong.
In essence, they have a process in place to grade and classify the type of information coming from each of those accounts prior to their enablement. I see no issue for them to feed that data back into training, even explicitly weighted for the field the research-access was given to.
Honestly, it's a perfect process: "Physics-research grants are reaching critical mass. Let's put priority on more physics field grants and boost the compute-resources for the physics model. Let's aim for some press-releases end of next quarter."
[0] https://help.openai.com/en/articles/10139500-researcher-acce...