Displaying topic specific tweets in Twitter

I'd like to integrate Twitter into my app but keep the tweets specific to the app topic. For example, if the app is about recipes, all tweets on the built in Twitter client will be about recipes. Basically acting like a chat client about recipes.

However, I don't think Twitter works that way. You basically follow someone (say the app's Twitter name) and see tweets from the app's Twitter name. In this case, customers w开发者_运维知识库ill follow the recipe app and can see its tweets. But I'd also like tweets from any followers to display in the Twitter client but only if they are relevant to the recipe app. In other words, I don't want anything a follower might tweet to appear. Meaning, they need to tweet under the recipe app for the tweet to appear. Maybe I'm confused about how Twitter works and this sort of focused tweeting won't be an issue. Can any one explain if this is possible?

---

Put a Hash Tag in the users tweets, such as #recipeappname. Then display tweets that only contain that Hash Tag.