This is more of a question concerning compatibility. Leaving analog out of the discussion I can think of very few digital boards that won't allow a monitoring "solution" to integrate with the board properly.
The solution may be manufactured by the parent company, or by a third party, however, in the end it's the boards built in or expansion capabilities that determine the ability or extent to which your primary solution can be expanded.
As I had said, many companies offer solution for your needs, and your initial purchase (board) should be made with those expansion capabilities in mind. My choice has been Soundcraft for any number of reasons, and although IEM and personal monitoring was a part of my initial buying decision, it was a small part.
In the end though a quick look at the boards (Performer) expansion capabilities left me knowing that should I need or want to "expand" my solution by "integrating" any number of personal monitoring or IEM solutions it would be a matter of choice, not chance.
Some solutions would be obvious, but keep in mind that you get what you pay for, and good solutions are not cheap. So, are you serious and want a lasting solution, or do you want a cheap solution that might work OK. It's your choice, and a choice that should be made when you purchase your board, the foundation for the house you're building.
Solutions include those from;
Allen and Heath
Aviom
dbx
Digital Audio Labs
Hear Technologies
Roland
etc.
http://dbxpro.com/en-US/products/pmc16