He told BBC Radio Cambridgeshire: "I'm not in charge of the overall football department as I see it.
"This club has a technical director and the manager liaises with him about recruiting players which is why I made the comments about being a head coach."
Barry Fry currently acts as the club's director of football and is responsible for conducting transfer negotiations.
Gannon is currently on a contract only until the summer and will meet with MacAnthony later in March to discuss his future.
"It's about defining the roles between the manager and the technical director in terms of who is ultimately responsible for the performance in the football department, who's responsible for recruiting, who's responsible for players leaving, who's responsible for how the budget is spent," said Gannon.
"I'm looking forward to having a conversation about this when we all get together in March."
Gannon believes that in future the club must be more organised when it comes to signing players and that this is reflected in their bloated 39-man squad, of which 11 players are out on loan.
Posh have signed over a dozen players since promotion to the Championship back in May but are set for an instant return to League One as they sit bottom of the division, 13 points from safety.
"It's important the club recruit properly, identify properly and make sure the players we bring in are adequate for League One," said Gannon.
"We can't be losing faith in new signings after a period of weeks and months."
Posh are once again struggling with injuries ahead of Tuesday's home match with Sheffield United.
We'll wait and see what type of manager Gannon turns out to be, first impression is that he's a little temperamental
Avellino
With Jake Livermore having been re-called by parent club Tottenham and Josh Simpson struggling with a virus they are particularly stretched in midfield.
In means Lee Frecklington and Charlie Lee look set to continue in the centre of the field, although it is an area Gannon is looking to strengthen.
"I like to play a three-man midfield and play football through midfield, so to suddenly be down a number of players in midfield is a huge problem," added Gannon.
"We're looking for potential long-term recruits who we can mould into what we are trying to achieve here."
Source: BBC Sport
Source: BBC Sport