Referring to the player

I am making a mod that needs to call a procedure from a ___rightClicked but not in the same procedure, how could i refer to the player from that second procedure?

The mod is meant for single-player, so I tried to set the player name as a string variable,  i don't know if i did it wrong or what, but even if the player's name is the variable, i can't get it to refer to that player specifically.

i need to check if the player has certain items in the inventory mostly. 

the main reason that i am doing this, is so that i can have a progression system, so in the main "when right clicked" procedure, it will just redirect things to a different procedure, based on a global variable