How is my IRR and TWOR calculated if I choose a data series in the performance?

I want to calculate the IRR of only my security transactions. I have different types of securities such as USD Equity, USD ETF, etc. And I want to individually and combined calculate the IRR. I have a taxonomy where I have cash, investments, loans, etc. listed out. Under the Investments all the securities I need are listed. If I choose the “investments” as my data series in the IRR calculation, will it give me IRR of the securities only?