Is there a way to store and then use a variable froinside a map?

Example.  I run a loop to create several users in my database and I get each new user's ID assigned to a variable.   Contact_id1, Contact_id2, Contact_id3

Then in my test, in another map where I am running through my test cases, I want to use the ID's from above in that map.  Example.

Test 1, 2 and 3 uses contact_id1,  test 4 uses contact_id2, etc

right now, in the map I have to set a column with some name like ID (1, 2, 3) and then inside the main test loop that calls a function, I do an IF statement to see what user I want to use using that ID column and then set that to a new variable, and then use THAT variable in the function call.

IF map ID = 1
Var contactID = contact_id1
else if map ID = 2
var contactID = contact_id2
etc

Then the function calls the variable contactID instead of a map cell

I want to be able to skip that extra step and just call the map data from the function call like I do all other fields.

Is this a possibility?  could there be a way to store a variable inside a map?