Yes. When I'm mastering a campaign I usually put restrictions on everything, including the selection of monsters I'm going to use.Are players in your group ok with the DM putting restrictions on things like races, classes, or source books?
The reason usually isn't that I'm worried about balance, it's about focusing on the campaign's theme. Imho, less is more in that regard.
Often, when we're several years into a campaign I remove some or all of the restrictions because at that point the players have a very good idea what is and what isn't appropriate for the campaign.
I'm also open-minded if a player wants to try something that requires restricted material. If I enjoy the character concept and the explanations are sound and rooted in roleplaying opportunities rather than powergaming, I make exceptions or make suggestions to implement the concept in ways that don't require restricted material.