Hi @Sumith0,
Welcome to the Community Center!
You can have different listings on your account and you can use the name citadel for each one, you will just need to give them slightly different names (e.g. apartment 1, 2 ). Follow this link to create a new listing.
Just to let you know, I have moved your post here to a new thread so that it doesn't get lost in another discussion and it is easier to find. I have also given it a title, please let me know if you want to change it!
In case you're not sure how to start a new thread - this CC Tutorial gives a step by step guide to starting a conversation in the Community Centre.
Happy Hosting!
Kirstie