How to add piece rate projects

How to add piece rate projects

I would like to add piece rate projects for currently employees to select.  Is there a way to do it.  Lets say i have piece rate work to sew a 1. dress 2. shirt 3. pants.  i would like to send an email to everyone with a link of available projects and then once someone selects it it is no longer available.  so if someone decides to do #2.  then all people will see if #1 and #3.