using .meas during .op for list of values
Just add this line

.meas OP I_VAR AVG I(VAR)

This assumes that you are interested in measuring the average current flowing through a resistor called VAR and the result is saved in a variable called I_VAR. For RMS current replaces AVG with RMS. This line of code is going to be called only if you run a OP (Operation Point) simulation. For transient, you can replace OP with TRAN.

The results can be seen in the erro log (Ctrl + L). There you can right click and select plot. A new window will open and then you can plot the current vs. the resistance values.