Can I see you in my office?
A request to speak privately in an office, typically said by a boss or superior, perhaps because one is going to be reprimanded. A: "Can I see you in my office?" B: "Oh man. Is this because I lost that account?"
Could I see you in my office?
and Can I see you in my office?I want to talk to you in the privacy of my office. (Typically said by a supervisor to a lower-ranking employee.) "Mr. Franklin," said Bill's boss sort of sternly, "Could I see you in my office for a minute? We need to talk about something."