You use the same syntax for the TBREAK debug command as you would for the BREAK debug command. The difference between these commands is that the BREAK debug command sets a conditional job breakpoint at the same position in all threads, while the TBREAK debug command sets a conditional thread breakpoint in the current thread.
To remove a conditional thread breakpoint, use the CLEAR debug command. When a conditional thread breakpoint is removed, it is removed for the current thread only.