If the group of people you don’t want to share certain Moments with are small, you might want to opt out of sharing with these people. To do this:

1. Go to the WeChat app main page and tap on the navicon and choose Settings.
2. Tap on Privacy and then tap on Don’t Share my Moments.
3. Tap on the + sign and tick friends that you don’t want to see your Moments; tap on OK. In the next page tap on Done.

_{credit : hongkiat.com}