AnkiApp lets you organize related cards within a deck by using tags. You can then set up a review that focuses only on reviewing these tagged cards.
Cards can be tagged from the cards view, or during a review session. For tagging during a review session, you can choose the "tag" option from the side menu. Starring or ignoring a card is a convenient way to quickly add a tag that allows you to 1) quickly find starred cards in the cards overview screen, or 2) keep cards out of review sessions (if ignored).
To tag a card from the Deck screen, open the menu, then select "Cards".
Then pick a card you'd like to tag. From the Card screen for that card, use the New button in the Tags section to give it a tag.
Go back to the Deck screen for this deck.
Use the settings button (the gear icon) in the bottom-left, next to the Review button, to open the review menu. Use the Tag button that appears, to select the tag you want to study.
All the cards in your review session will now have the chosen tag.