Yes you can follow addresses on Loch.
The "Following" tab contains a list of all the addresses you follow categorized by the Address, Name Tag, a section for you to add Remarks.
You can add many addresses to this list as you want.
You can upload any address yourself by clicking "Add address" on the top right.
Or you can Follow a wallet address pre-selected from Loch's Leaderboard.
It's useful to view what the smart money buying and selling.
You can follow whales, founders, fund managers, or whoever you like.