How to run a conditional to check if the userid = userid browsing the page?

[ludachris]

I'm working on customizing iTrader 2.5 for vb 3.8, specifically, the rating detail page. It's set up so that only buyer/seller and mods can view the detailed comments. I'd like to change that, but I realized I'd have to put a conditional in place to limit who can reply to the rating.

I'd like to only show a Reply button on the detail page if the person browsing the feedback is the person who feedback was left for. Only the person who the feedback was left for should be able to reply to feedback that was left for them.

How would I structure a condtional statement to do this?