Nope! There's no reason to try and get cats to eat out of only their bowls. In fact, there is little point in trying to designate bowls for each cat.
We have, well, I can't actually tell you how many cats we currently have - I'll just say it is a "few."
They eat out of whatever bowl is closest and if one takes over someone's bowl, the previous owner just moves on to another bowl.
There is absolutely no reason to have any concerns about cats eating out of the same bowl.
There are a lot question posted here asking about how to get a cat to eat only out of his or her bowl.
You can't, there's no point in trying, there is no benefit from it, it is just a waste of time.
Another question that gets asked a lot as to separate items for each cat.
How many litter boxes should you have? That's a frequent question.
The most popular (but not necessarily correct) answers are one litter box for each cat or one litter box for each cat plus one more.
The correct answer - as many as you need in order to be able to keep them clean based upon the load imposed by the number of cats.
There was a time, long ago and not for very long, we had 15 cats. Had we tried to have one liter box for each cat, we would not have had anyplace to put them all. Instead we had two very large busboy boxes - used to clear off tables at restaurants - about 30 inches by 18 inches and about 6 inches deep.
Cats will share things like bowls and litter boxes just fine.
You might find the cats likes having food and water at more than one place around the house and, if you want to, you can cater to their whims.
If you have a large house, maybe an extra litter box would be good - but regardless of how many you have they must be kept clean.
Go ahead and let anyone eat of any bowl they want to. If the other cat disagrees, they will work it out between themselves.