A stream of vendors testified Tuesday that they had done high-end work for former Trump campaign chairman Paul Manafort, from tailoring suits to building kitchens to customizing backyards, and were paid through overseas wire transfers.

The testimony, on the second day of Mr. Manafort’s trial on tax and bank fraud charges, was part of prosecutors’ effort to show that Mr. Manafort had funded his lavish lifestyle from proceeds for consulting work he had done in Ukraine that he didn’t pay taxes on.

Judge...