Hello,
I believe the answer is yes.
Of course, if you install the full product on a system, that system can be remotely managed in the same manner as if the agent had been "pushed" to that system originally. You can also use the Security Configuration Tool to restrict who can run the local install of the product, if you'd only like the system to be remotely managed.
I'm confident that it is also possible to perform a manual install of the product locally on a server you'd like to manage, and only install the base "agent" and not the local console/GUI. I'll see if I can find more information on this.
Thanks.