in most situations the employer controls the work assignments, not the employee.
the employer has no obligation to hold a job or take an employee back unless the employment is covered by FMLA and then the job protection is limited to 12 weeks.
employers can dismiss or terminate employees that have had a comp injury.
if you believe you are being retaliated against for filing a claim, you can bring your evidence of discrimination to the comp court.
your permanent disability rate can be increased by 15% if the employer does not offer modified work ( lasting 12 months and at least 85% of your pre-injury wages).