Can I change my academic affiliation after a conference paper is accepted but before submitting the camera ready version?
According to your comment, you are asking whether the conference will allow you to change your listed affiliation between acceptance and submission of the camera-ready version.

In my experience, the answer is yes. I have done this several times without issue. If there's no way to do this by yourself in the paper submission site, you can email the chair and ask him/her to update your information.

Whether you should use your new institution as your affiliation just to get them  to pay for your expenses is another issue entirely, which you have already asked about in another question.