Re: How does eBay track IPs?
The safest option is not to do what your doing. That's the safest option.
But to answer your question, if you were to do this, your accounts will be safe. eBay only captures your IP address when you visit their site. Since your not visiting the site when your on other user accounts (with potentially suspended accounts), then their not tracking your IP, and therefore not linking you.
But its not a good practice to do such a thing as you may accidentally end of on ebay, or get forwarded, or accidentally click on an ad etc. | 
